Winter Park Fly Fishing Guide: Fraser River, Williams Fork, and Gold Medal Water

Quick Reference

What	When	Key Numbers
Fraser River	May, late June - Oct (avoid runoff)	100-200 CFS optimal; fish before noon in summer
Williams Fork tailwater	Year-round (best during Fraser runoff)	100-300 CFS ideal; 1-mile hike-in
Colorado River	July - October (Gold Medal near Granby)	1,500-3,300 CFS ideal float
Summer temps	Fish 5:30-7am start, stop by noon	Water hits 65°F+ by early afternoon
Fly shop	Mo Henry's Trout Shop, Winter Park	Current conditions and local intel

Overview

Winter Park is best known for skiing, but the Fraser Valley holds some of Colorado's most underrated trout water. The Fraser River runs 32 miles from Berthoud Pass to its confluence with the Colorado River near Granby, flowing directly through town and offering walk-from-downtown fishing. Within 45 minutes, you can reach the technical Williams Fork tailwater, the Colorado River's Gold Medal sections, and dozens of alpine lakes in the Indian Peaks and Never Summer Wilderness areas.

Grand County contains 25% of Colorado's Gold Medal water—more than any other county in the state. The upper Colorado River from the Fraser River confluence to Troublesome Creek (near Kremmling) holds that designation, as does a 3-mile private stretch of the Fraser on Granby Ranch property.

The area sees less pressure than Summit County or the Vail Valley, making it a strong choice for anglers who want quality fishing without fighting crowds.

Seasons and Conditions

Fraser Valley rivers follow Colorado's high-country pattern, with some variation due to reservoir releases:

Season	Timing	Conditions	Best Bet
Early Season	May	Pre-runoff, water still low and clear	Fraser River, Williams Fork
Runoff	Late May-Jun	Freestones blown out, high muddy flows	Williams Fork tailwater only
Summer	Jul-Aug	Rivers clear, prime hatches, best conditions	All waters fishable
Fall	Sep-Oct	Stable flows, spawning activity, BWO hatches	Fraser River, Colorado River
Winter	Nov-Mar	Cold but fishable, midge hatches	Williams Fork, lower Fraser

Key timing notes:

• Best fishing is May before runoff, late June through July after runoff, and mid-September through mid-October
• Caddis, mayflies, BWOs, and stoneflies hatch heavily from July through September
• Williams Fork tailwater fishes best at 100-300 CFS—check releases before driving
• Alpine lakes accessible from early June through mid-October

Fraser River

The Fraser is Winter Park's home water—a 32-mile tributary of the Colorado River starting high on the Continental Divide at Berthoud Pass (11,307 ft) and flowing northwest through Winter Park, Fraser, and Tabernash before joining the Colorado near Granby.

Water Character

The Fraser is a meandering freestone with riffles, runs, tailouts, and deep pools. It's not dramatic pocket water—think gentle gradient through willowed meadows. Fish average 12-15 inches with some browns pushing 20 inches, though the best fish are typically found in the harder-to-reach canyon sections or on private water.

Fraser River Flow Windows

Track Fraser River flows at Tabernash for current conditions. Unlike tailwaters, freestone flows vary dramatically with snowmelt and irrigation diversions.

CFS (Tabernash gauge)	Conditions
50-100	Low water, spooky fish, fine tippet essential, early/late season
100-200	Optimal - good wading, fish spread through runs and riffles
200-350	Higher but fishable, fish move to edges and slower water
350-500	Marginal, murky water likely, stick to edges
500+	Blown out, unfishable—typically late May through mid-June

Critical note: The Fraser and Moffat Tunnel diversions significantly reduce flows. Peak runoff typically hits in early June, with flows sometimes exceeding 1,000 CFS at the combined Colorado/Fraser confluence at Windy Gap.

Summer Water Temperature Warning

This is critical: Due to low flows from diversions, the Fraser can reach dangerous temperatures (65°F+) during July and August afternoons. Both the Fraser and upper Colorado regularly hit 65°F between 11:30 AM and 1 PM in summer.

Summer fishing protocol:

• Fish early: Hit the water by 5:30-7:00 AM
• Stop by noon: Water temps become dangerous for trout by early afternoon
• Monitor conditions: Stop fishing if water temps approach 70°F or fish appear lethargic
• Skip hot afternoons entirely—stressed fish have higher mortality even after release

The Colorado River Headwaters Chapter of Trout Unlimited monitors temps closely and posts advisories.

Local etiquette: Due to high pressure in the Fraser Flats section between Fraser and Tabernash, locals ask anglers to voluntarily skip fishing this stretch on Tuesdays and Thursdays to give fish recovery time.

Fraser River Regulations

Section	Regulations
Headwaters to St. Louis Creek confluence	Artificial flies and lures only, catch and release on rainbows
St. Louis Creek confluence to Colorado River	Bag/possession limit: 2 trout

Access Points

Berthoud Pass to Winter Park Resort (National Forest Land):

• Robbers Roost Campground: Public camping with river access
• Midland Campground: USFS campground with creek access
• Both areas offer walk-in fishing on Forest Service land

Winter Park to County Road 8 in Fraser:

• Confluence Park: Where Vasquez Creek meets the Fraser in Winter Park. Fishing decks, interpretive signage, accessible trails. Good starting point for beginners.
• Fraser River Trail: Paved multi-use path paralleling the river with multiple access points
• Idlewild Campground: Good access near town
• Road turnouts: Pull-offs along US-40 provide access

Fraser Canyon / Tabernash Section (Best Public Water):

Local anglers consider the canyon sections near Tabernash the best fishing on the Fraser. Here's how to access it:

From the Winter Park Information Center, follow Highway 40 north 5.6 miles to County Road 83. Turn right for 0.4 miles, then left on County Road 84. Continue 0.75 miles to County Road 844 (also marked BLM 2751 / Strawberry Road) on the left. Follow Strawberry Road 1.4 miles to the parking area on the left.

From the parking area, hike downhill approximately 0.55 miles (about 15 minutes) to reach the river and canyon. Public water is available along the canyon and upstream a short distance.

Hazards: The railroad and private landowners guard their property closely along this section. Stay off railroad tracks and respect private property boundaries. Avoid the canyon during high runoff—the scramble down can be treacherous when wet.

Gold Medal Stretch (Private): A 3-mile Gold Medal section exists on Granby Ranch property north of the Fraser Canyon. This stretch is guided-only through outfitters with access agreements.

Gear for the Fraser

• Rod: 9-foot 5-weight with floating line
• Tippet: 4X-5X for nymphs, 5X-6X for dries (go lighter in low, clear water)
• Leader: 9-12 feet depending on water clarity
• Approach: The river is relatively flat—work the seams, undercut banks, and deeper pools. In low water, stay low and cast from a distance.

The Fraser Valley produces healthy wild rainbows, browns, and occasional cutthroat.

Tributary Creeks: St. Louis, Vasquez, and Crooked Creek

When the Fraser is marginal (blown out, too warm, or too crowded), several tributaries offer quality small-stream fishing.

St. Louis Creek

St. Louis Creek is a 10+ mile fishable tributary joining the Fraser in the town of Fraser. It offers diverse water—beaver dams, fast riffles, willow-lined banks, and open meadow sections.

Access: From the Winter Park Information Center, turn right (west) on Highway 40 to Fraser. Turn left at the Wendy's stoplight, then right onto County Road 721, then left onto County Road 73. Continue to St. Louis Campground. The creek runs south of the road with several turnouts and small parking areas along the way.

Character: Averages about 6 feet wide, shallow in most places. Stealth is essential—these are spooky brook trout in clear water.

Gear: 3-4 weight rod. Hip waders or wading boots for crossing. Small dries (Adams, Royal Wulff, midges, gnats) in sizes 14-18. Grasshopper patterns in summer.

Regulations: Artificial flies and lures only. Catch and release on rainbows. 2 trout limit from St. Louis Creek to the Colorado.

Tip: Slowly wade upstream, practicing bow-and-arrow casts and short-line techniques. Expect eager brook trout. Bring bug spray—beaver ponds mean mosquito country.

Note: Dispersed camping is not allowed in the Fraser Experimental Forest.

Vasquez Creek

The closest creek to downtown Winter Park. Cutthroat, brown, rainbow, and brook trout depending on elevation. Access via Vasquez Road from Winter Park.

Character: Intimate small-stream fishing. Most fish won't exceed 12 inches, but you can easily get into double digits on a single dry fly fished drag-free. Low pressure and tough access (some bushwhacking required) keep crowds away.

Tip: Fish straight up the creek, hitting spots along the way. Cover water at different elevations for a chance at all four trout species.

Regulations: 4 trout limit. South Fork of Upper Vasquez Creek and Lil' Vasquez Creek are fly/lure only; all cutthroat must be released.

Crooked Creek

Similar character to St. Louis and Vasquez. Worth exploring if you want to cover a lot of water.

Williams Fork River

The Williams Fork tailwater below Williams Fork Reservoir is one of Colorado's lesser-known quality fisheries—a technical tailwater with large trout and minimal crowds. It's about 45 minutes from Winter Park via Highway 40 to Parshall.

Why Fish the Williams Fork

This small tailwater punches above its weight. Cold, clear releases from the reservoir support quality rainbow and brown trout that see far less pressure than waters near Denver. The catch? Limited public access and a hike to reach the water.

Williams Fork Flow Windows

CFS	Conditions
Under 100	Very low, technical fishing, fish concentrated in pools
100-200	Good - manageable wading, fish spread out
200-300	Ideal - optimal fishing, good insect activity
300-400	Higher but fishable, stick to edges
400+	Difficult wading, less productive

Note: Denver Water controls releases, which can be unpredictable. Check flows before making the drive.

Williams Fork Regulations

• Flies and lures only
• Catch and release for all trout

Access Points

Kemp/Breeze State Wildlife Area (Kemp Unit):

From Highway 40 in Parshall, turn left (south) on County Road 3. At 0.7 miles, turn right into the parking area (restrooms available). Follow the clearly marked trail approximately 1 mile to reach the Williams Fork River. About 2 miles of public water extends west toward the Colorado River confluence.

Trail conditions warning: The hike is exposed with no shade. In summer, it can be brutally hot—bring plenty of water and sun protection. Some sections of the boardwalk are in disrepair with collapsed sections, holes, and protruding nails. Watch your step. Mosquitoes can be heavy near the river.

Parshall/Confluence Access: Park in the town of Parshall off Highway 40. Wade across the Colorado River to reach the Williams Fork confluence. This approach requires crossing the Colorado, so plan for appropriate water levels—dangerous during runoff.

Important: Denver Water Board controls the land directly below the dam—that section is closed to fishing. Public access begins a short distance below the dam and extends to the Colorado River confluence.

Fishing the Williams Fork

The hike in filters out casual anglers, but those who make the walk find quality trout in clear water. The river features deep runs, pools, and pocket water lined with cottonwood trees.

Best times: The Williams Fork fishes well year-round, but is especially valuable during Fraser runoff (late May-June) when it's often the only fishable water in the area. Morning fishing is generally best; afternoon wind can make casting difficult.

Approach: Expect technical fishing—long leaders (12 feet), light tippet (5X-7X), fluorocarbon essential, and careful presentations. These fish see fewer anglers but are still educated.

Camping: Free camping available at Williams Fork Reservoir and Sugarloaf Campground (11 first-come, first-served sites along the river above the reservoir).

Colorado River (Upper)

The Upper Colorado from the Fraser River confluence near Granby to the Kremmling area is Gold Medal water and one of the best float fishing destinations in the state.

Gold Medal Section: Windy Gap to Troublesome Creek

This 20-mile stretch from Windy Gap Reservoir (at the Fraser confluence) to Troublesome Creek east of Kremmling is designated Gold Medal water. The regulations are flies and lures only, catch and release.

The river transitions from meandering meadow water near Granby through dramatic Byers Canyon, then opens into broader riffles and runs approaching Kremmling.

Byers Canyon Access (Detailed)

Byers Canyon offers 4 miles of deep, heavy-duty pocket water below Hot Sulphur Springs (20-30 minutes from Winter Park). This is the closest quality Colorado River fishing to Winter Park, but it requires effort to access.

Access Point #1 - Pioneer Park (East End): From Highway 40, at mile marker 9.3, turn right onto County Road 20, then left over the bridge. Pioneer Park offers camping, restrooms, and a picnic area with over 1 mile of river access on both sides, plus access to the east end of Byers Canyon. 2 trout limit.

Access Point #2 - West End of Byers Canyon: At mile marker 11.6 on Highway 40, parking area on the right. Steep, short trail to the river. You can walk along the canyon edge. Avoid during high water—the scramble is dangerous when wet.

Access Point #3 - Hot Sulphur Springs State Wildlife Area (Joe Gerrans Area): At mile marker 11.8, turn left at the east end of the bridge onto County Road 50. 2,300 acres on both sides of the river with camping, vault toilets, and a short hike down to the river from parking.

Canyon hazards: You have to scramble down about 100 feet of boulders to reach the water in the canyon proper. This is not for the mobility-challenged. The pocket water is deep and heavy—wading is challenging. But the effort filters out most anglers, and the fishing can be excellent.

Additional SWA units:

• Lone Buck Unit: 3.5 miles west of Hot Sulphur Springs on Highway 40 (south of highway)
• Jenny Williams Unit: 3 miles west on Highway 40 to County Road 50 (east end of bridge), then 2 miles south
• Paul F. Gilbert Fishing Area: 3 miles west on Highway 40 to west end of Colorado River bridge, then south

Pumphouse and Downstream Access

Pumphouse Recreation Area: The main access point for the best floating water. From Kremmling, head south on Highway 9, turn right on Trough Road, continue about 10 miles to Pumphouse. Boat ramp, parking, and camping available. This is the put-in for the famous Pumphouse-to-State Bridge float.

Radium Recreation Area: Below Pumphouse, similar character. Hot springs along the river banks make this a memorable destination. Five-mile float to the next takeout.

Flow Windows

CFS	Conditions
800-1,500	Relaxed float, some shallow spots
1,500-3,300	Ideal - good current, Class II rapids run clean
3,300-5,500	Faster, more technical floating
Over 5,500	High water caution—bridge clearance issues

Float vs. Wade

Near Kremmling, the Colorado is wadeable at moderate flows. Pumphouse, Radium, and the islands near State Bridge offer walk-in access. But a drift boat or raft dramatically expands what you can reach. Many outfitters offer guided float trips.

For detailed float fishing information, see our Upper Colorado Summer Guide.

Alpine Lakes

Grand County contains dozens of alpine lakes between 10,000-12,500 feet in the Arapaho National Forest, Indian Peaks Wilderness, Never Summer Wilderness, and Rocky Mountain National Park. These high-country waters offer solitude and willing fish.

Nearby Stillwater Options

Meadow Creek Reservoir: 50 acres, 30-45 minutes from Winter Park. Non-motorized boats only. Take County Road 83 east of Tabernash, fork left onto County Road 84. First-come, first-served camping. Day pass ($5) or multi-day pass required.

Monarch Lake: 150 acres in the Arapaho National Recreation Area. Non-motorized boats permitted. Trailhead for Indian Peaks Wilderness. Good populations of rainbows and browns.

Lake Granby: One of Colorado's largest reservoirs. Rainbow trout, brown trout, kokanee salmon, and lake trout. Full-service marina access.

High-Country Lakes

Popular alpine destinations include Lake Evelyn, Horseshoe Lake, Lake Dorothy, Columbine Lake, Strawberry Lake, St. Louis Lake, King Lake, Betty and Bob Lakes, and Lost Lake. Most require hiking—some require overnight backpacking trips.

Best Timing: July through September for the highest lakes. Early June through mid-October for more accessible options.

Species: Brook, rainbow, cutthroat, and brown trout depending on the lake. Four-trout limit with standard Colorado regulations.

Hatches and Flies

Fraser River and Colorado River Patterns

Spring (May-Early June):

• Blue-Winged Olives (18-22): Sparkle Duns, RS2, Parachute BWO
• Midges (20-24): Zebra Midge, Black Beauty

Summer (Late June-August):

• Pale Morning Duns (16-18): Sparkle Dun, Bunny Dun
• Caddis (14-18): Elk Hair Caddis, Beadhead Breadcrust, X-Caddis
• Golden Stoneflies (8-12): Pat's Rubber Legs, Stimulator
• Yellow Sallies (14-16): Yellow Stimulator

Fall (September-October):

• Blue-Winged Olives (18-22): Major fall hatch
• Tricos (20-24): Early morning spinners
• Midges (20-24): Consistent year-round

Williams Fork Tailwater

Technical water requires careful pattern selection:

• Midges (20-24): Mercury Midge, Jujubee, Top Secret Midge
• BWOs (20-22): RS2, Barr's Emerger
• Scuds (16-18): Pink and olive variations
• San Juan Worms: During high-water events

Small Stream Patterns (St. Louis, Vasquez, Crooked Creek)

Keep it simple on the tributaries:

• Attractor dries (12-16): Royal Wulff, Parachute Adams, Stimulator
• Terrestrials (summer): Hoppers, beetles, ants
• Small dries (16-20): Adams, Griffith's Gnat, Elk Hair Caddis
• Midges (20-24): Year-round importance, especially September through April

Terminal Tackle

• Fraser River: 9-foot leaders, 4X-6X tippet
• Williams Fork: 12-foot leaders, 5X-7X tippet, fluorocarbon essential
• Colorado River floats: 9-foot leaders, 4X-5X tippet, stouter for streamers
• Small streams: 7.5-foot leaders, 5X-6X tippet

Devil's Thumb Ranch (Private Water)

Devil's Thumb Ranch is an Orvis-Endorsed Lodge in Tabernash offering private water access on 4 miles of Ranch Creek and 1 mile of the Fraser River.

Private Water Options

Ranch Creek: A headwaters stream flowing through the property. Three distinct sections offer different character—from willow-lined beaver ponds to open meadow water. Browns, brookies, rainbows, and occasional cutthroat. Perfect for a 2-3 weight rod.

Section 1 is available for non-guided fishing by lodge guests ($75 private water rod fee). All other private water requires a guide.

Two Stocked Ponds: Good for beginners or families.

Season: March 1 through October 31, weather dependent. Mid-June through September is prime.

The ranch operates a full fly shop with equipment rental and expert guides for all skill levels.

Local Fly Shops and Guides

Mo Henry's Trout Shop

Winter Park's local fly shop offering personalized trips on the Fraser, Colorado, and mountain streams including Troublesome Creek.

• Current conditions and reports
• Equipment and gear
• Guided trips

Winter Park Flyfisher

Guided fly fishing trips and lessons for all experience levels. They fish the Colorado and Fraser Rivers plus private ranch water.

• Float trips on the Colorado
• Walk-wade instruction
• Private water access

Devil's Thumb Ranch Fly Shop

Full-service Orvis shop at the ranch with equipment rental, instruction, and guided access to private water.

• Beginning through advanced instruction
• Private water fishing
• Complete equipment packages

Pro tip: Call ahead for current conditions. Local shops know when the Fraser is running too warm, when Williams Fork releases are favorable, and where fish are holding.

Regulations Summary

Water	Key Regulations
Fraser River (upper)	Flies/lures only, catch and release on rainbows
Fraser River (lower)	2 trout limit
Williams Fork	Flies/lures only, catch and release
Colorado River (Gold Medal)	Flies/lures only, catch and release
Byers Canyon area	2 trout limit
St. Louis Creek	Flies/lures only, catch and release on rainbows, 2 trout limit below
Vasquez Creek	4 trout limit (South Fork: flies/lures only, release all cutthroat)
Alpine Lakes	Standard CO regulations, 4 trout limit

Always verify current regulations with Colorado Parks & Wildlife before your trip.

Safety Considerations

Altitude

Winter Park sits at 9,000 feet. The Fraser headwaters near Berthoud Pass exceed 11,000 feet. Acclimate before strenuous hiking or wading. Symptoms of altitude sickness can impair judgment on the water.

Summer Water Temperatures

This bears repeating: Both the Fraser and Colorado can hit dangerous temperatures (65°F+) by midday in summer. Fish early, stop by noon, and skip hot afternoons entirely. Stressed fish have higher mortality even when released properly.

Cold Water

All area rivers run cold in spring and fall. The Williams Fork tailwater stays frigid year-round. Hypothermia is possible with extended immersion even in summer.

Afternoon Thunderstorms

Summer afternoons bring lightning, especially on exposed ridges and alpine lakes. Plan to be off high-country water by early afternoon. This aligns well with the water temperature guidance—another reason to fish mornings.

Runoff

Late May through mid-June brings dangerous high water on freestone streams. The Williams Fork tailwater remains fishable, but the Fraser and Colorado can run at several times normal volume with limited visibility. Wading is dangerous; stick to the Williams Fork or wait it out.

Williams Fork Trail Hazards

The mile-long trail to the Williams Fork is exposed with no shade, collapsed boardwalk sections, holes, and protruding nails. Bring water, wear sun protection, and watch your footing.

Byers Canyon Scramble

Reaching the water in Byers Canyon requires scrambling down 100 feet of boulders. This is not for everyone. Avoid when wet.

Using RiverReports

Plan your Winter Park fishing with real-time flow data:

• Check current flows on the Fraser, Colorado, and Williams Fork
• Compare alternatives: If your target is blown out, find fishable water
• Track trends: Rising or falling flows affect fish behavior
• Historical data: Understand typical conditions for your travel dates

Track all Winter Park area rivers on RiverReports:

• Fraser River at Tabernash
• Colorado River near Kremmling
• Williams Fork below reservoir

Download the RiverReports app for mobile access while on the water.

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