Big Horn County · reservoir
Yellowtail Afterbay Reservoir
1 stocking on record · Montana FWP
Yellowtail Afterbay Reservoir is a reservoir in Big Horn County, Montana, stocked with Rainbow Trout — most recently on May 6, 2026. FishableWaters aggregates every stocking record for this water from Montana FWP; the latest schedule and today's bite windows are above.
Best days this week
Days near a new or full moon tend to fish best.
Today's bite windows
Conditions, next 3 days
Today
Overcast
98°
69°
12 mph
3%
Sat
Overcast
106°
69°
15 mph
0%
Sun
Overcast
106°
76°
27 mph
0%
↗ pressure risingPost-front rising pressure can slow things down for a day.
Stocking ledger
| — 2026 — | ||||
| May 6 | Rainbow Trout | 6,239 | 5.1000000000000005" | |
Angler reports
What's biting
No reports yet — be the first
Best bite times
No reports yet
Field notes
No notes yet
Nearby waters
- Lime Kiln Creek0.2 mi
- Grapevine Creek0.8 mi
- War Man Creek3.1 mi
- Black Canyon Creek4.9 mi
- Mountain Pocket Creek6.5 mi
- South Fork Grapevine Creek6.0 mi
- North Fork Grapevine Creek6.0 mi
- South Fork West Soap Creek7.4 mi
Seasons, limits, and rules are the state's call — check the official MT regulations and buy your license before you go. We link the source; we never restate the rules.
Yellowtail Afterbay Reservoir fishing — FAQ
What fish are stocked in Yellowtail Afterbay Reservoir?+
Yellowtail Afterbay Reservoir is stocked with Rainbow Trout in Big Horn County, Montana, most recently on May 6, 2026 by Montana FWP. The full stocking ledger is on this page.
Do I need a license to fish Yellowtail Afterbay Reservoir?+
Yes — Montana requires a fishing license. Buy one from the state and check current seasons and limits before you go; both are linked on this page.
Where is Yellowtail Afterbay Reservoir?+
Yellowtail Afterbay Reservoir is a reservoir in Big Horn County, Montana. Driving directions and an interactive topo map are on this page.
Data: Montana FWP · updated May 6, 2026 · checked daily · we publish what agencies publish, nothing else.