MEDIAN FLOW RATE · 1 YEAR
0cfs 91.1% vs avg
Optimal band: 1–1 cfs
PERIOD HIGH
267cfs
PERIOD LOW
1cfs
RUNNABLE
56%
last 1 year in band
Gauge Height
6.68ft
Weather Map
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Your History · Blanco River at San Marcos, TX
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Station Location
29.8795, -97.9108Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-10-16 00:00 UTC
Site #08171350·USGS
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