Fishing Report
Upper Mason 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.
45.620328, -111.996251
Est. water temp
52.4°F
v1 estimate from air temperature — not a sensor reading
Species on record
No species on record yet for this lake.
Location
Upper Mason Lake · 45.6203, -111.9963
Map data © OpenFreeMap, OpenMapTiles, OpenStreetMap contributors
Nearby
Other lakes nearby
FAQ
Common questions
What fish are in Upper Mason Lake?
No fish species have been recorded for Upper Mason Lake yet. Check the live conditions to plan a trip on the surrounding water.
When's the best time to fish Upper Mason Lake?
No species are modeled for Upper Mason 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 Mason Lake to see the best window for current conditions.
Where is Upper Mason Lake?
Upper Mason Lake is near Mammoth, MT, at 45.6203, -111.9963.
Plan your trip to Upper Mason Lake
Get the hour-by-hour bite forecast and the best times to fish Upper Mason Lake, scored against live National Weather Service weather for this exact spot — showing what every input contributed and how well the evidence supports it.