Planning a trip down one of these canyons? Flow conditions change fast, and the right water level can make or break a trip. This page pulls live data straight from official USGS stream gauges, updated roughly every hour, so you can check conditions before you launch or while you're still deciding on dates.

Each guidebook below has its own gauge (or gauges) matched to that stretch of river. Flow is shown in cubic feet per second (CFS), along with a 7 day trend so you can see whether the river is rising, falling, or holding steady.

Need help reading the numbers for your trip? Every one of our river guides includes detailed flow information for the specific canyon you're running, along with mile by mile maps, rapids, and campsites.