Big Thompson River fishing
Big Thompson River
What's biting at Big Thompson River
Species commonly reported here -- tap any card for techniques, target seasons, and other waters where it's been caught.
Plan your trip down to the hour
Same weather feed Snoflo's iOS app uses -- updated continuously from NOAA / yr.no.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max so trends jump out at a glance.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks. Hover any point for the full breakdown.
Nearby streamflow
USGS streamgauges within reach of Big Thompson River -- updated continuously from the National Water Information System.
| Streamgauge | Discharge | View |
|---|---|---|
| Grand River Ditch At La Poudre Pass | 77 cfs | → |
| Colorado R Below Baker Gulch | 150 cfs | → |
| Grand Lake Outlet Blw Chipmunk Ln At Grand Lk | 35 cfs | → |
| St. Vrain Creek At Lyons | 89 cfs | → |
| South St. Vrain Creek Near Ward | 37 cfs | → |
| Colorado River Bl Shadow Mountain Reservoir | 23 cfs | → |
Plan a longer trip
The closest campgrounds, parks, boat launches, and reservoirs so a fishing run can grow into a weekend.
Parks
- Comanche Peak Wilderness
- Rocky Mountain National Park
- Viestenz Smith Mountain Park
- Neota Wilderness
- Wilderness Never Summer
- Cache La Poudre Wilderness
Reservoirs
- Marys Lake Dike No. 1
- Marys Lake Dike No. 2
- Carriage Hills #1 (Upper)
- Olympus
- East Portal Dam
- Lily Lake Dam
Boat launches
- Boat Launch Grand Lake
- Hilltop Boating Site
- Grand County
- Us 34 Grand County
- Chambers Lake Boating Site
- Boat Ramp Larimer County
Points of interest
- Beaver Meadows Visitor Center
- Moraine Park Discovery Center
- Fall River Visitor Center
- Alpine Visitor Center
- Kawuneeche Visitor Center
Paddle runs
- Begins 0.5 Miles Upstream From End Of Fern Lake Road To Eastern Boundary Of Rocky Mountain National Park
- Gnar Section
- Main Section
- Begins 0.5 Miles Upstream From End Of County Hwy 115 To Eastern Boundary Of Rocky Mountain National Park
- Headwaters To Boundary Of Rocky Mountain National Park
- Headwaters To Ends 0.5 Miles Upstream From End Of County Hwy 115
Angling safety & ethics
- Know the regulations
- Check local fishing rules, seasons, size limits, and license requirements to ensure legal and sustainable angling.
- Handle fish responsibly
- Use wet hands, minimize air exposure, and release fish gently to improve survival rates when practicing catch-and-release.
- Choose the right gear
- Match your rod, line, and tackle to the species and conditions to increase success and reduce unnecessary harm to fish.
- Respect the waterway
- Avoid disturbing habitat, prevent bank erosion, and keep a safe distance from spawning areas to protect ecosystems.
- Keep it clean
- Pack out all line, hooks, bait containers, and trash. Discarded gear can injure wildlife and degrade waterways.
Set push alerts in the Snoflo app
Save Big Thompson River as a favorite, set a custom threshold (water temperature, streamflow, snowpack), and the iOS app will push the moment conditions cross.
About Big Thompson River
What fish species are found at Big Thompson River?
Snoflo tracks the species commonly reported at Big Thompson River -- see the Fish Species panel above for the live list with images and links to per-species pages.
How fresh is the weather data on this page?
The hourly forecast updates throughout the day from the NOAA / yr.no public feeds. Streamflow data comes live from USGS streamgauges, also refreshed continuously.
Can I get alerts when conditions change?
Yes -- alerts are managed through the Snoflo iOS app. Favorite this area, set a threshold (water temperature, streamflow, snowpack), and you'll get a push the moment it crosses.
Do I need a fishing license?
Yes. Check your state agency's regulations for license requirements, seasons, size limits, and any waterbody-specific rules before fishing Big Thompson River.
How do I get to Big Thompson River?
Tap Open in map in the hero above to center the Snoflo interactive map on this area, or grab the coordinates from the location facts panel.
Other angling spots near here
Snoflo-tracked fishing areas within driving distance of Big Thompson River.