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All Colorado reports
Blue River Fishing Report — Colorado
Photo: Jeffrey Beall Opens in a new tab. · CC BY 4.0
Should I go fishing?
Yes — worth going.
No single best way to fish. Wading and Bank fishing have the same top score. Use current access, footing, weather, and local rules to choose.
Fishing rating74
Rating updatedRiver local time:
Why this recommendation?
USGS shows 54 cfs. The flow has been stable over about 6 hours. USGS marks this reading provisional and may revise it. USGS records for this date (1963-2025, 63 readings) show a median near 106 cfs and a low-water marker near 54 cfs; today's flow is unusually low for the date. Low water can make fish spooky, warm, pressured, or concentrated; check temperature and handling risk.
Available live dataHighHow much of the live flow, weather, and alert data came back.
Confidence in this recommendationHighCurrent flow, weather, alerts, and trip-critical signals support this decision.
Usually checks again about every 45 minutes
If you go
- Check first
- Use the below-Dillon gauge for Silverthorne flow and release context.
- Try
- Fish one lane thoroughly before changing pools.
- Leave when
- Skip the Silverthorne plan when icy banks remove safe footing, when section-specific rules are unclear, when town pressure has every visible seam occupied, or when higher releases turn a simple crossing into risky tailwater current.
Flow and weather
Showing server-checked river conditions while current readings refresh.
- Flow
- 54 cfs
- From the latest stored river check. Open the official source for the newest reading.Water 43.0°F · 24h high 45.3°F · USGS provisional
- Air forecast
- 52°F
- Next 24h high
- 75.0°F
NWS air forecast near
- Rain chance
- 0%
Latest stored weather check
Mostly Clear
- Wind
- 3 mph
- Weather checked
More forecast and source details
Mostly Clear
National Weather Service
Blue River Silverthorne forecast point
The National Weather Service forecast is temporarily unavailable.
Live data
Where these readings come from
RiverReports gauge: Blue River below Dillon
Water 43.0°F · provisional · 24h high 45.3°F provisionalWater observed · high observed
Flies for this time of year
Seasonal starting points, not a live hatch report. Match what you see on the water.
- Blue-Winged Olive PatternsBWO dryView fly guide ↗
- Zebra MidgeView fly guide ↗
- RS2View fly guide ↗
- Trout Streamer Patternssmall streamerView fly guide ↗
See flies for every season
SeasonWhat to look forFlies to try
Winter
What to look forMidges, mysis-style food, small baetis
Flies to try
Also try black beauty
Spring
What to look forBWOs, midges, caddis
Summer
What to look forPMDs, caddis, yellow sallies, terrestrials
FallThis season
What to look forBWOs, midges, small baitfish
Each fly name opens its matching Fly Box guide.
More fishing tips
Methods, fish species and trip notes
How to fish Blue River today.
The Blue fishes best when releases are stable and trout are not stressed by ice, crowding, or low warm water. If town water is crowded, consider scouting another public reach instead of forcing the same pool.
Low clear release
Use small flies, long leaders, and sight-fishing patience.
Stable medium release
Nymph riffles, slots, and drop-offs. Dry-dropper rigs work in shallower lanes.
High release
Skip risky crossings and fish banks, softer seams, and protected edges.
Winter ice
Expect shelf ice, slow takes, and small midge-focused windows.
Wading, bank fishing or floating?
Access choicesNo single best option
Wading and Bank fishing have the same top score. Use current access, footing, weather, and local rules to choose.
Wading74/100
Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
Bank fishing74/100
Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.
FloatingNot recommended
This report does not recommend floating this reach.
Full river report
Is Blue River worth the trip today? Check flow, weather, hatches, access, and rules for Colorado before you go.
The Blue below Dillon is a pressured cold tailwater where small flies, clean drifts, and exact rule checks matter. Use the Silverthorne gauge before planning around town access or lower Blue alternatives.
Fishing words used on this page
- U.S. Geological Survey (USGS) gauge
- A USGS gauge is an official river station that measures flow or water height.
- Cubic feet per second (cfs)
- Cubic feet per second, or cfs, shows how much water passes the gauge each second.
- Technical fishing
- Technical fishing means the fish are hard to fool, so careful casts and natural drifts matter.
- Nymph
- A nymph is a young water insect. Anglers also use the word for a fly that copies it.
- Riffle
- A riffle is shallow, fast water broken by rocks.
- Seam
- A seam is the line where fast and slow water meet.
- Blue-winged olive (BWO)
- Blue-winged olives, or BWOs, are small mayflies that often hatch in cool or cloudy weather.
- Caddis
- Caddis are small water insects. The adults look a little like tiny moths.
- Dry-dropper
- A dry-dropper rig has a floating fly with an underwater fly tied below it.
- Emerger
- An emerger copies an insect as it rises from below the water toward the surface.
Why this call
Why this score
FlowUse caution
USGS shows 54 cfs. The flow has been stable over about 6 hours. USGS marks this reading provisional and may revise it. USGS records for this date (1963-2025, 63 readings) show a median near 106 cfs and a low-water marker near 54 cfs; today's flow is unusually low for the date. Low water can make fish spooky, warm, pressured, or concentrated; check temperature and handling risk.
SeasonHelps
Fall: Cooler weather, BWOs, and streamer windows can improve the plan when flows are steady.
Water temperatureHelps
USGS water temperature is about 43F, and the rolling 24-hour high did not trigger a heat caution. USGS marks the temperature data provisional and may revise it.
Public alertsHelps
No active NWS alert was returned for this forecast point.
Fishing usefulnessHelps
Skip the Silverthorne plan when icy banks remove safe footing, when section-specific rules are unclear, when town pressure has every visible seam occupied, or when higher releases turn a simple crossing into risky tailwater current.
Trip notes
Check these before you choose a reach.
Use the below-Dillon trend more than a single target number. Stable or gently rising releases are the cleanest read for technical nymphing and dry-dropper work. A sudden push should move you to softer banks, shorter wades, or a different reach.
Skip the Silverthorne plan when icy banks remove safe footing, when section-specific rules are unclear, when town pressure has every visible seam occupied, or when higher releases turn a simple crossing into risky tailwater current.
Choose the section before tying on flies: the Silverthorne town water for a quick technical session, the SWA-mapped access points when you want clearer public-boundary confidence, or the lower Blue only after confirming that separate reach's flow and rules.
If the Silverthorne water is too crowded or pushy, pivot to the upper Colorado for a broader public-river day or to another clearly posted Blue reach only after checking that reach's separate rules and release context.
Blue River access and rules.
Use these places as starting points. Open the access link below and check posted signs before you park or enter.
Before you go
CPW lists multiple Blue River special fishing rule sections, including Silverthorne catch-and-release water and seasonal or section-by-section rules. Verify the exact section before fishing.
Where to access the river
Silverthorne town reach
Convenient public access, heavy pressure, and technical catch-and-release planning.
Blue River SWA context
CPW maps should be checked carefully because some areas have no public access.
Lower Blue below Green Mountain
A different reach with separate flow, access, and rule planning.
- Read CPW reach language before applying one rule to the whole river.
- Town access is easy, but fish see heavy pressure.
- Private property and no-public-access areas appear in the broader Blue River area.
- Winter ice can make simple wading dangerous.
Sources and report details
Official agencies and primary river operators come first. Secondary tools are labeled so you know what carries the most weight.
Rules and closures
Check what is allowed, where the rule applies, and whether the river is open.
Flow and weather
Check the latest river reading and forecast before you leave.
Access and land
Check public entry points, land rules, and seasonal access changes.
More helpful links
Use these links for stocking, safety, and other local details.
See all 7 checked sources
Rules and closures
Check what is allowed, where the rule applies, and whether the river is open.
What this source covers
Open the current rules and check the river section, season, and special limits.
Flow and weather
Check the latest river reading and forecast before you leave.
What this source covers
Open this page and check the latest safety advice before your trip.
What this source covers
Open this river reading to check the latest level, flow, and update time.
What this source covers
Open this river reading to check the latest level, flow, and update time.
Access and land
Check public entry points, land rules, and seasonal access changes.
What this source covers
Open the land or access page, then check signs before you park or enter.
What this source covers
Open the land or access page, then check signs before you park or enter.
More helpful links
Use these links for stocking, safety, and other local details.
What this source covers
Open this page for more river information and check when it was last updated.
How this report was checked
How this report was checked
Reviewed byBlueStreamFly River Review Team
Trip guidance checked
What was checked: This report starts with official regulation, access, flow, weather, and public-river sources, then adds practical planning guidance for anglers.
Live measurements and forecasts keep their provider timestamps. Rules, access, and trip guidance use the source-review date shown here. BlueStreamFly planning advice is editorial interpretation, not an agency notice.
First-hand experience: BlueStreamFly does not claim a first-hand visit or local field test for this report unless a real contributor is explicitly named and linked.
Quick questions
What section does this Blue River report cover?
It focuses on the Silverthorne reach below Dillon Reservoir, with lower Blue context where it affects planning.
Why is the Blue River technical?
The water is clear, cold, heavily fished, and governed by section-by-section rules, so small flies and clean drifts matter.
What gauge should I use?
Use RiverReports and USGS 09050700 below Dillon for the Silverthorne tailwater.
Can I fish the same way below Green Mountain?
Not safely without a separate check. The lower Blue has different access, flow, and rule context.