Idaho · river
Big Lost River below Inl Div near Arco
USGS monitoring location. Launch access and paddling suitability have not been verified.
Weather comparison · not a safety rating
River reading unavailable
Current river flow is unavailable or over an hour old. Weather alone cannot confirm conditions on this water.
Weather observation: Fri, 02 Oct 2026 01:00:00 GMT.
River observation: unavailable.
Page checked: Fri, 02 Oct 2026 01:09:22 GMT. Readings older than one hour are not used for the current score.
Wind
7 mph
gusting to 10 mph
Air temp
67°F
0% chance of rain
River flow
Unavailable
USGS has not returned a fresh reading. See the gauge link below.
Weather outlook
Sunday · 98
Thu
94
73°
Fri
58
80°
Sat
91
74°
Sun
98
81°
Best
Mon
78
80°
Tue
43
80°
Wed
56
81°
Compares forecast wind, air temperature and rain. Does not assess river flow, swell, currents, water temperature or launch access. All times are local to this location.
Wind, next 12 hours
mph| Hour | Wind (mph) | Gusts (mph) |
|---|---|---|
| 7p | 7 | 10 |
| 8p | 7 | 10 |
| 9p | 6 | 9 |
| 10p | 6 | 8 |
| 11p | 6 | 8 |
| 12a | 7 | 8 |
| 1a | 8 | 11 |
| 2a | 7 | 11 |
| 3a | 4 | 5 |
| 4a | 4 | 6 |
| 5a | 7 | 11 |
| 6a | 5 | 8 |
Current score unavailable
We don't have launch notes for this one
This page is built from the USGS gauge at this location, and uses available public readings. We haven't verified where to put in, what the hazards are, or whether this stretch is legal or sensible to paddle. We'd rather say that than invent it. The links below are where to find out.
We also don't have a verified safe-flow range here, so the Paddle Score reflects weather only. Judge the flow number against local knowledge, not against our score.
Do your own homework
We show you live conditions. For local knowledge — where to put in, what the hazards are, whether it's worth the drive — here's where paddlers actually talk about this water. We don't vet these sources; check the dates and judge for yourself.
- Paddler discussion on Reddit
Trip reports and local warnings, straight from the source
- Search American Whitewater
Rapid classifications and gauge-linked run descriptions
- Satellite view and access roads
Check parking, put-ins, and what the banks actually look like
- Video from this water
The fastest way to see the character of a run before you drive
- USGS gauge 13132520
Full hydrograph, historical flows, and station metadata