Harper Lake fishing
Harper Lake
What's biting at Harper Lake
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 Harper Lake -- updated continuously from the National Water Information System.
| Streamgauge | Discharge | View |
|---|---|---|
| Boulder Cr At North 75th St Nr Boulder | 37 cfs | → |
| Big Dry Creek At Westminster | 1 cfs | → |
| Fourmile Creek At Orodell | 2 cfs | → |
| Boulder Creek Near Orodell | 63 cfs | → |
| Coal Creek Near Plainview | 1 cfs | → |
| Left Hand Creek At Hover Road Near Longmont | 1 cfs | → |
Plan a longer trip
The closest campgrounds, parks, boat launches, and reservoirs so a fishing run can grow into a weekend.
Campgrounds
- Tipi Village
- Standley Lake
- Camp Patiya
- Boulder County Fairground
- Union Reservoir
- Rifleman Phillips Group Campground
Parks
- Leon Wurl Wildlife Sanctuary
- Cleo Mudrock Park
- Pirates Park
- Spruce Street Park
- Dutch Creek Park
- Louisville Sports Complex
Reservoirs
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 Harper Lake as a favorite, set a custom threshold (water temperature, streamflow, snowpack), and the iOS app will push the moment conditions cross.
About Harper Lake
What fish species are found at Harper Lake?
Snoflo tracks the species commonly reported at Harper Lake -- 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 Harper Lake.
How do I get to Harper Lake?
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 Harper Lake.