Judith Basin County · reservoir · 229 acres
Ackley Lake
Stocked 2× on record · Montana FWP
Ackley Lake is a reservoir in Judith Basin County, Montana, stocked with Rainbow Trout — most recently on May 20, 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
96°
65°
17 mph
8%
Fri
Overcast
91°
69°
37 mph
7%
Sat
Overcast
100°
64°
26 mph
1%
↗ pressure risingPost-front rising pressure can slow things down for a day.
Stocking ledger
| — 2026 — | ||||
| May 20 | Rainbow Trout | 10,300 | 2.84" | |
| May 20 | Rainbow Trout | 14,670 | 4.18" | |
Angler reports
What's biting
No reports yet — be the first
Best bite times
No reports yet
Field notes
No notes yet
Nearby waters
- Antelope Creek3.6 mi
- Spring Branch3.9 mi
- Spring Creek4.4 mi
- West Fork Antelope Creek5.9 mi
- Coyote Creek9.1 mi
- Courtneys Creek6.7 mi
- Red Shed Lake7.3 mi
- Little Trout Creek8.1 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.
Ackley Lake fishing — FAQ
What fish are stocked in Ackley Lake?+
Ackley Lake is stocked with Rainbow Trout in Judith Basin County, Montana, most recently on May 20, 2026 by Montana FWP. The full stocking ledger is on this page.
Do I need a license to fish Ackley Lake?+
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 Ackley Lake?+
Ackley Lake is a reservoir in Judith Basin County, Montana. Driving directions and an interactive topo map are on this page.
Data: Montana FWP · updated May 20, 2026 · checked daily · we publish what agencies publish, nothing else.