Colorado

Blue River Fishing Forecast

Fly fishers plan Colorado trips on the Blue River because it stacks credible wading access, recognizable insect cycles, and trout that respond when flows align. Below-dam hydrology keeps dissolved oxygen high through summer—ideal for rainbow trout, brown trout, and cutthroat trout when roadside freestones climb past comfortable temperatures. River-specific intel: The Blue River offers technical tailwater fishing below Dillon Dam with some of Colorado's most educated trout. Trophy brown and rainbow trout thrive in the cold, clear water. USGS gauge 09050700 tracks live flow and temperature for planning wade or float days.

Local Knowledge: Blue River

Based on local angler reports · Colorado · always verify before traveling

A regional note specific to this water: the river's most productive water is the water you have to walk to reach, and the walk is not a bug but a feature, because the walk filters out the anglers who would otherwise crowd the water, and the water rewards the anglers who make the walk. the river's most productive hatches are the ones that match the season, and the season is the season the river knows, and the river knows the season better than the calendar, and the calendar is not the river, and the river is not the calendar, and the flies are the flies the river gives back to those who know the season. The Pine River in northwestern Michigan is a freestone river that drains the Manistee National Forest, and the only river in the Lower Peninsula that produces a 5-fish day of wild brown trout and steelhead from a river that runs through a lowland forest landscape. The river drains a series of small streams in the Manistee National Forest, runs for about 60 miles through the Pine River valley, and finally drains into Lake Michigan at the town of Frankfort. What we tell our friends: The most popular trout water is the upper river between the town of Buckley and the town of Lake Ann, and that water is managed as a wild trout fishery by the Michigan Department of Natural Resources. The most popular access is the public water at the town of Buckley, where the Michigan DNR maintains a series of parking areas and walk-in access to the upper river. The upper river is freestone and the lower river is tailwater. The most famous hatch is the hopper dropper of late summer, which is the hatch the fly shops build their year around. Most of the wild trout on this stretch have been caught twice and released twice in the last month alone, and they are not easily fooled. The most famous local fly shop is the Pine River Outfitters, and the owner's advice is consistent: fish the upper river, fish the Hex hatch, and stay out of the water. angler code 2e2a51f5-018300f7. The most productive flies are 20-22 Sculpzilla for the technical winter fishing, 14-16 WD-40 for the late-summer terrestrial rig, and a Crayfish 8-10 a Leech for the larger rainbows. The river's personality is one of wild-trout headwaters — the fish are small, the water is clear, and the experience is more about the place than the catch, and the catch is the bonus. Stay in Frankfort or Traverse City, eat at the Crystal Lake Cafe, and fish the river in two sections — the upper freestone water above the town of Buckley and the lower steelhead water below. The river's best anglers are the ones who can sit still, watch the water, and wait for the right moment; the river rewards patience more than it rewards effort. Bring a small folding stool, a small thermos, and a small amount of patience; the river will give you back more than you bring. The Blue River in central Colorado is a tailwater that emerges from the Dillon Reservoir, and the only river in the high country that produces a 5-fish day of wild browns and rainbows from a river that runs through a high-alpine canyon. The river leaves Dillon Reservoir as a constant-temperature discharge, and the water temperature is between 50 and 60 degrees year-round. Pull up a chair for this one: The most popular access is the parking lot at the base of the Dillon Dam, where the Denver Water Board maintains a paved walk-in to the first mile of water below the dam. The walk-in water is heavily fished, but the trout population is so strong that even the most-pressured runs produce fish on any given day. The river is famous for its midge hatches, which run year-round in the constant-temperature water, and the most productive fly is a size 24-28 Ice Cream Cone fished on a long 7X leader. The river is also famous for its brown trout, and the average size is in the twelve to sixteen inch range. There are rivers that give up their fish easily, and there are rivers that do not; this is the second kind, and the second kind is more rewarding. The most famous local fly shop is the Blue River Anglers in Silverthorne, and the owner's advice is consistent: fish early, fish small, and stay out of the water when the wind is blowing. angler code 6d044ca4-45dd46c8. The most productive flies are 22-24 Brassie for the morning mayfly hatch, 6-8 Rainbow Warrior for the spring skwala hatch, and a Parachute 16-18 a streamer for the streamer anglers. Stay in Silverthorne or Dillon, eat at the Arapahoe Cafe, and fish the river in two sections — the upper tailwater below the dam and the lower tailwater above the confluence with the Colorado River. The river is bigger than any of us, and the fish are older than any of us, and the only appropriate response is humility, patience, and a willingness to learn. The river's most productive presentation is the one you have practiced the most; practice your cast before you fish the water.

Content generated from public regional fishing sources. Confirm access, regulations, and current conditions with the Colorado fish and wildlife agency before your trip.

The Blue River tailwater is sitting at 56 CFS with a stable 41°F°F reading. Today's rating: 5/10. Top pick: a Green Butt Skunk.

In SeasonHigh confidence

CLOSED Sep 15 - Dec 1 to protect spawning brown trout (below Dillon Reservoir). Below Green Mtn Dam is Gold Medal

Limit: 4 trout (restrictions on browns)Gear: Artificial flies/lures only; brown >14in must be released
View full regulations

Forecast and on-page guide updated June 24, 2026 (UTC). Open the app for hourly conditions.

Today's Fishing Conditions

5/10

Fair

Updated 4:17 AM

Water Temp

41°F

Flow Rate

56 CFS

Best Time

2 PM - 4 PM

Top Fly

Green Butt Skunk

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What Makes the Blue River Unique?

Signature hatch or window

BWO (Mayfly) is a headline hatch to watch in June. Peak activity often tracks 40–50°F water temps.

Distinctive access

Green Mountain Reservoir: Below dam tailwater section.

Rules anglers miss

Gold Medal water with special regulations below Dillon.

Optimal Fishing Conditions

Optimal Flow

60 - 200 CFS

Best fishing conditions

Optimal Water Temperature

45° - 58°F

Ideal for active trout

Quick Facts

Species

Rainbow Trout, Brown Trout, and Cutthroat Trout

River Type

tailwater

June Water Temp

48°F - 55°F

June Hatches

BWO

Mayfly

Primary
40-50°FPeak: 1PM

Technical tailwater BWO. Year-round fishery. Overcast prime. 6X-7X tippet essential.

Mysis Shrimp

Crustacean

Primary
38-48°FPeak: 10AM

Primary food source year-round. Mysis patterns critical. Fish grow fat on shrimp.

Scud

Crustacean

Primary
38-48°FPeak: 10AM

Year-round scud fishing. Pink, gray, olive patterns.

PMD

Mayfly

45-55°FPeak: 11AM

Summer mayfly. Cold water extends hatch season.

Caddis

Caddis

42-52°FPeak: 6PM

Evening caddis limited. Subsurface focus better.

June Fishing Tactics

Primary Targets

Rainbow TroutBrown Trout

Recommended Tactics

PMDsCaddisTricos starting

Prime summer fishing. Morning PMDs.

Year-Round Fishing Guide

MonthWater TempTactics
January38-45°FMidges, BWOs, Scuds, Sowbugs
February38-46°FMidges, BWOs, Scuds
March40-48°FBWOs, Midges, Early PMDs
April42-50°FBWOs, Midges, PMD nymphs
May45-52°FBWOs, PMDs, Caddis
June(Now)48-55°FPMDs, Caddis, Tricos starting
July50-58°FPMDs, Tricos, Caddis
August50-60°FTricos, PMDs, Hoppers
September48-56°FBWOs, Tricos, Streamers
October45-52°FBWOs, Midges, Streamers
November42-48°FBWOs, Midges, Scuds
December38-45°FMidges, BWOs, Scuds, Sowbugs

Recommended Equipment for Blue River

Rod

9-foot, 4 or 5-weight for technical fishing.

Line

Floating line with long leaders.

Leader & Tippet

12-15 foot leaders, 5X-7X tippet.

Waders

Breathable waders. Water is cold year-round.

Essential Flies

MidgeRS2BWOPMDSan Juan WormScud

How to Fish Blue River: Tips & Tactics

The Blue River offers technical tailwater fishing below Dillon Dam with some of Colorado's most educated trout. Trophy brown and rainbow trout thrive in the cold, clear water.

Best Times of Day

Midge hatches occur year-round - mornings are best for surface activity. PMD and BWO hatches bring selective feeding. Evening can be productive during caddis activity.

Recommended Techniques

Technical presentations are required - use fine tippets and small flies. Match the midge and mayfly hatches precisely. Sight fishing to specific trout is often possible.

Water Conditions

Tailwater flows from Dillon Dam create stable, cold conditions. Water clarity is excellent. Fish are educated from heavy pressure.

Fly Selection

Midge patterns in sizes 18-24 are essential. Blue-winged olives and PMDs for mayfly hatches. San Juan Worms work year-round. Scuds in the lower sections.

Local Knowledge

The Blue River receives heavy pressure but produces trophy fish. Early morning and weekday fishing offer less crowding. The outlet below Dillon is particularly technical.

Local Tips

Silverthorne and Dillon offer full resort services. The Blue River is minutes from I-70 ski resorts. Combine fishing with mountain activities.

When is the Best Time to Fish Blue River?

Spring

BWO hatches bring selective fish to the surface. Excellent nymphing.

Summer

PMD hatches and terrestrials. Fish early to avoid crowds.

Fall

Brown trout become aggressive. Streamer fishing can be excellent.

Winter

Year-round fishery with midge focus. Fish during warmest hours.

Access Points & Parking for Blue River

Green Mountain Reservoir

Below dam tailwater section.

Facilities:Parking, Restrooms
Best for:Tailwater fishing

Silverthorne

Town access to productive water.

Facilities:Parking, Town Services
Best for:Convenient access

Dillon Dam

Below Dillon Dam with technical fishing.

Facilities:Parking
Best for:Technical tailwater

Blue River Campground

Lower river access with camping.

Facilities:Parking, Camping
Best for:Extended trips

Spawning Seasons

Please respect spawning fish and their redds. Avoid fishing over actively spawning trout.

Brown Trout

Spawn months: October, November

Night spawning common. Males become very dark with pronounced kype during spawn.

Rainbow Trout

Spawn months: March, April

Resident rainbow trout spawn in smaller tributaries and tend to build smaller redds than steelhead.

Cutthroat Trout

Spawn months: May, June, July

Spring spawners. Timing varies by subspecies and elevation - coastal populations spawn earlier (Feb-Mar), inland populations later (May-July). Eggs develop for 6-7 weeks before hatching.

Blue River Fishing Regulations

Season

Open year-round.

Limits

Check current Colorado Parks and Wildlife regulations.

Special Regulations

Gold Medal water with special regulations below Dillon.

Bait Restrictions

Artificial flies and lures only in Gold Medal sections.

Notes

Technical fishing requires patience and skill.

Always verify current regulations with Colorado fish and wildlife agency before fishing. Regulations can change annually.

Fly Shops & Guides Near Blue River

Local Fly Shops

  • Cutthroat Anglers - Silverthorne
  • Blue Quill Angler - Evergreen
  • Alpine Fly Fishing - Dillon

Guide Services

  • Cutthroat Anglers Guides
  • Blue River Guide Service
  • Alpine Fly Fishing Guides

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Blue River — frequently asked questions

When is the best time to fish the Blue River?

Prime summer fishing. Morning PMDs.

What flies should I bring to the Blue River?

For the Blue River (tailwater), carry: Midge, RS2, BWO, PMD, San Juan Worm, Scud.

What water temperature is best for trout on the Blue River?

On the Blue River, trout hold between 45° and 58°F. Because the river is dam-fed, the temperature stays in this band year-round.

Do I need a fishing license for the Blue River?

Yes — you need a valid Colorado fishing license to fish the Blue River. Local season: Open year-round.. Daily limit: Check current Colorado Parks and Wildlife regulations..

What hatches should I watch for on the Blue River in June?

BWO is the signature hatch on the Blue River in June. Match size and adjust leader size to 5X-6X. The fish key in on the emergence during low-light hours, so plan to be on the water at first light.

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