San Antonio Creek
Sandoval Co. · 20 mi · Class I
—CFS
Loading…
Optimal: 30–200 CFS · USGS #08313350
⚡Flow data is live from USGS·Rapid classifications and CFS ranges need community verification·Know this river?
20 mi
Length
Class I
Difficulty
30–200 cfs
Optimal
45 cfs
Avg Flow
40 cfs
Hist. Median
#08313350
USGS Gauge
Valles Caldera National Preserve

San Antonio Creek flows through the Valles Caldera National Preserve, a volcanic caldera formed 1.25 million years ago. The spring-fed creek meanders through vast mountain meadows inside the caldera, offering gentle paddling in one of the most unique geological settings in North America.

Trip sections
Valles Caldera meadows — Class I, volcanic meadow creek
Below caldera to Jemez River — Class I, forested canyon
Outfitters
Valles Caldera Outfitters
Guided creek experiences in the caldera
72-Hour Flow Forecast
NOAA NWPS
Loading forecast...
10-Year Flow Patterns
See 10 years of flow patterns for this river — historical analysis is a Pro feature.Upgrade to Pro →
Your Optimal Range
Set your personal optimal CFS window per river — custom ranges are a Pro feature.Upgrade to Pro →
Data Quality

River conditions are community-verified. CFS ranges, difficulty ratings, and trip sections may not reflect every flow level or seasonal change. Always check current conditions, scout unfamiliar rapids, and paddle within your skill level. If you spot an error, use the Improve This River button at the top of the page — your local knowledge is what makes this atlas accurate.