Scattered cloud dimming the moonlight, with a stiffish breeze from the WSW and the barometer heading up. Activity on Grassy Lake should centre on inflow corners and shaded margins. Make the evening the heart of the trip. Make the first hour count and build on it. Falling temperatures are switching fish back on.
The bites are poor now
Night
Grassy Lake stands in Beaverhead County, Montana. This is mixed forest ground. Small at around 3 acres: two anglers spread out cover most of it. On size it sits at the modest end of our Beaverhead County list. You are 39 miles from Anaconda. Boise is the closest city, 201 miles away. The nearest edge is a long way off, so local rules apply throughout.
No figure exists for depth, so let the water show you. Still water like this holds fish on the edges rather than out in the open. Bays and points beat straight shoreline every time on water like this. Records held for Beaverhead County cover rainbow trout, brook trout and brown trout. Records at county level tell you what is around, not what is stocked here. Grassy Lake repays a walk before the first cast.
Averages here run 53°F at the top of summer and 18°F at the bottom of winter. The middle months are generous; the ends are demanding. Hard water holds through the cold months, breaking up near mid May. Average temperatures cross freezing around mid May in spring and again near early November in autumn. The open run goes from the thaw to the freeze, and April through October covers most of it. It holds true on Grassy Lake more years than not.
Whether the bank is open is not something our records settle. No car park, ramp or path is recorded within easy reach of the shore. Trout here take small spinners, spoons and, where fly water allows, a nymph or dry. Where the road in crosses private land, ask first. Signs go up and come down, so check on the day. Should this one be busy, Bobcat Lakes is 1.3 miles off. Ask locally about Grassy Lake if anything is unclear.
31%
The bites are poor now
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 5.3 | 5.5 | 6.6 | 8.1 | 7.8 | 8.4 | 10.6 | 11.8 | 11.9 | 12 | 14.1 | 16.2 | 16.3 | 16.2 | 15.6 | 15.6 | 14 | 11.3 | 8.3 | 6.3 | 5.4 | 5 | 4.9 | 4.4 |
| 36° | 36° | 36° | 37° | 37° | 37° | 36° | 36° | 37° | 40° | 43° | 44° | 45° | 46° | 46° | 45° | 43° | 40° | 38° | 37° | 36° | 35° | 35° | 34° |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 29.98 | 29.95 | 29.95 | 29.94 | 29.94 | 29.97 | 29.97 | 29.99 | 30.01 | 30.02 | 30.03 | 30.03 | 30.03 | 30.02 | 30 | 30 | 30.01 | 30.03 | 30.06 | 30.08 | 30.1 | 30.11 | 30.11 | 30.12 |
| 60 | 57 | 60 | 59 | 57 | 58 | 59 | 60 | 59 | 52 | 48 | 45 | 46 | 45 | 46 | 48 | 52 | 61 | 68 | 72 | 73 | 74 | 75 | 76 |
Sam
AI Fishing Assistant for Grassy Lake
Morning
Afternoon
Evening
Best bite time
Best bite time
Best bite time
Best bite time
Best bite time
Best bite time
Best bite time