Rivers · Runs · Gauges
The online guide to
the world's waterways.
Real-time flows, rapids, put-ins and take-outs for paddlers, rafters and anglers — 14,006 gauges across 367 rivers and 478 runs.
Live gauge readings — see all on the flows pages.
Today's featured run
Upper South Boulder Creek
on South Boulder Creek · Colorado - US
- Class
- V+
- Current flow
- 21 cfs about 1 hour ago
- Status
- Too Low
USB is a short class V wilderness run near Boulder infamous for its ability to destroy boaters. For some local hair boaters, this is their backyard training run. For others, it's a run they contemplate stepping up to from the comfort of their living room in the off season, onl...
Run detailsFrom the gallery
Built for the put-in decision
One place to answer the only question that matters the night before: is it running?
Flows
Live readings from USGS, CDWR and CDEC gauges with 12- and 24-hour trend arrows and runnable ranges per run.
Check a gaugeRivers & Runs
Beta for 478 runs: class ratings, rapids, access points, camps and community trip reports.
Find a runMap
Every run, rapid, gauge and access point on an interactive topo map — flow colors show what's running right now.
Open the map