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Boysen Reservoir
Mon Sep 21 – Thu Sep 24, 2026 · Bank / Kayak / Boat · Primary: Walleye
Boysen — walleye honest lead.
Midweek outlook
Times in this Cast are Mountain Time (MT).
Mon 09-21
68°/44°Fog
Wind to 6 mph · precip 1%
Tue 09-22
80°/46°Mixed
Wind to 19 mph · precip 39%
Wed 09-23
77°/58°Overcast
Wind to 7 mph · precip 39%
Thu 09-24
79°/60°Overcast
Wind to 13 mph · precip 1%
Dam / level / current cheat sheet
Boysen Dam (USBR) — re-check.
How to fish it — Bank / Kayak / Boat
Bank
State park pockets.
Kayak
Creek arms on big wind.
Boat
Main-lake structure; Mon–Thu better.
Pattern: Walleye on points/soft bottom; bass in arms.
Ethanol-free fuel near this water
Shoshoni / Thermopolis — Pure-Gas.org; verify E0 at pump. Prices move — verify at pump. Pure-Gas is crowdsourced.
Lure box — Top / Mid / Bottom
Built for Walleye (species-honest).
Top
Walking bait / popper when bait is up.
Mid
Swimbaits, cranks, spinnerbaits, or spoons by depth.
Bottom
Jigs, Ned/rigs, drop-shots; live/dead bait where legal for walleye/trout.
Life stage + What's on the menu
Stage: Mid/late September transition.
Menu: Perch, crayfish, baitfish
Also hot / also in season
Largemouth, perch
Looking ahead
Fall transition continues next 1–3 weeks. Re-check tournaments for Heavy Traffic. Shared waters: one writer/cycle.