Valley County · reservoir · 7 acres
Big Rock Detention Reservoir
Big Rock Detention Reservoir is a reservoir in Valley County, Montana. FishableWaters aggregates every stocking record for this water from Montana's fish & wildlife agency; 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
Stocking ledger
No published stocking records yet. This water stays in our books — the ledger begins the hour its state agency publishes a record.
Angler reports
What's biting
No reports yet — be the first
Best bite times
No reports yet
Field notes
No notes yet
Nearby waters
- Sage Hen Reservoir0.4 mi
- Cisco Reservoir2.2 mi
- Kaulitski Reservoir2.2 mi
- Conrad Reservoir1.5 mi
- Knob Reservoir2.4 mi
- Gordon Reservoir2.3 mi
- Bean Reservoir2.2 mi
- Script Reservoir3.3 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.
Big Rock Detention Reservoir fishing — FAQ
Do I need a license to fish Big Rock Detention 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 Big Rock Detention Reservoir?+
Big Rock Detention Reservoir is a reservoir in Valley County, Montana. Driving directions and an interactive topo map are on this page.