Fishing Report
Upper Boulder Lake Fishing Report
Mammoth, MT
Modeled from National Weather Service data, plus solunar and sun/moon times computed in-house. This is a computed report, not an eyewitness catch report.
45.600361, -112.119331
Est. water temp
54°F
v1 estimate from air temperature — not a sensor reading
Species on record
No species on record yet for this lake.
Location
Upper Boulder Lake · 45.6004, -112.1193
Map data © OpenFreeMap, OpenMapTiles, OpenStreetMap contributors
Nearby
Other lakes nearby
FAQ
Common questions
What fish are in Upper Boulder Lake?
No fish species have been recorded for Upper Boulder Lake yet. Check the live conditions to plan a trip on the surrounding water.
When's the best time to fish Upper Boulder Lake?
No species are modeled for Upper Boulder Lake yet, so there's no species-specific feeding window to name. The score still gives the light window 25% of its total, an input Bitespan grades "Well supported". Check today's bite forecast for Upper Boulder Lake to see the best window for current conditions.
Where is Upper Boulder Lake?
Upper Boulder Lake is near Mammoth, MT, at 45.6004, -112.1193.
Plan your trip to Upper Boulder Lake
Get the hour-by-hour bite forecast and the best times to fish Upper Boulder Lake, scored against live National Weather Service weather for this exact spot — showing what every input contributed and how well the evidence supports it.