Custer County · stream · order 5 river · ~270 cfs typical
East Fork Big Lost River
Stocked 3× on record · IDFG
East Fork Big Lost River is a stream in Custer County, Idaho, stocked with Rainbow Trout (Triploid) — most recently on Jul 8, 2026. FishableWaters aggregates every stocking record for this water from IDFG; 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
Mostly clear
82°
54°
15 mph
12%
Fri
Partly cloudy
87°
60°
21 mph
2%
Sat
Overcast
88°
61°
22 mph
0%
↗ pressure risingPost-front rising pressure can slow things down for a day.
Stocking ledger
| — 2026 — | ||||
| Jul 8 | Rainbow Trout (Triploid) | 441 | 6" | |
| Jun 17 | Rainbow Trout (Triploid) | 396 | 6" | |
| Jun 3 | Rainbow Trout (Triploid) | 381 | 6" | |
Angler reports
What's biting
No reports yet — be the first
Best bite times
No reports yet
Field notes
No notes yet
Nearby waters
- North Fork Big Lost River0.0 mistocked Jul 22, 2026
- Twin Bridges Creek1.5 mi
- Wildhorse Creek2.0 mistocked Jul 23, 2026
- Summit Creek3.7 mi
- Garden Creek4.0 mi
- Kane Creek4.1 mi
- Burnt Creek4.6 mi
- Grasshopper Creek4.0 mi
Seasons, limits, and rules are the state's call — check the official ID regulations and buy your license before you go. We link the source; we never restate the rules.
East Fork Big Lost River fishing — FAQ
What fish are stocked in East Fork Big Lost River?+
East Fork Big Lost River is stocked with Rainbow Trout (Triploid) in Custer County, Idaho, most recently on Jul 8, 2026 by IDFG. The full stocking ledger is on this page.
Do I need a license to fish East Fork Big Lost River?+
Yes — Idaho 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 East Fork Big Lost River?+
East Fork Big Lost River is a stream in Custer County, Idaho. Driving directions and an interactive topo map are on this page.
Data: IDFG · updated Jul 8, 2026 · checked daily · we publish what agencies publish, nothing else.