What water level is good for paddling San Marcos River — City Park (Rio Vista)?

This section is generally runnable at 80–600 cfs (a conservative estimate — see our methodology). Below that it gets too low and bony; well above the top of the range it becomes pushy and then dangerous. We compare the live USGS reading to that range to produce today's verdict.

How do I check San Marcos River levels?

We read USGS gauge 08170500 — the same public data USGS publishes — about every 30 minutes and compare it to the runnable range for this reach. You can also view the raw gauge yourself at waterdata.usgs.gov.

Is San Marcos River — City Park (Rio Vista) good for beginners?

This section is rated Class I. At good levels it suits confident beginners and up, but it can have riffles or small rapids. Scout anything you can't see, and stay off it at high water.

When is the best time to paddle San Marcos River here?

Typically Year-round, when flows are most reliable for this section. Spring can run high after rain or snowmelt; late summer can drop too low. Always check today's gauge reading rather than assuming.

How long does it take to float San Marcos River — City Park (Rio Vista)?

This reach is about 4 miles, roughly 2.5 hours at a relaxed pace. Higher water is faster; low water and headwinds are slower. Add time for stops.

San Marcos River — City Park (Rio Vista): River Level Today — Can You Paddle It?

Class I4 mi · ~2.5 hrSan Marcos RiverTexas

Verdict · updated Aug 26, 9:45 PM UTC

Good to paddle

Levels are within the typical runnable range for this section.

Estimated range

111 cfs

3.8 ft gauge height

USGS gauge 08170500

Runnable 80 – 600 cfs

080600704

What this means today

At 111 cfs the San Marcos River is inside the runnable range but only 31 cfs above the 80 cfs floor, so it is sitting at the shallow end of what this reach runs at. A dry few days would take it under.

Over the last 24 hours it has barely moved, 111 cfs to 111 cfs. Daily means over the past 7 days have run between 110 cfs and 114 cfs, ending roughly where it started.

Paddling City Park (Rio Vista)

San Marcos River at City Park (Rio Vista) is a 4-mile Class I run in Texas — easygoing moving water with light riffles and nothing technical. Most paddlers put in at City Park / Rio Vista, San Marcos and take out at IH-35 / Thompson's Islands, a trip that runs about 2.5 hours at a relaxed pace.

Whether it's worth the drive comes down to flow. This section generally paddles well at 80–600 cfs (a conservative estimate — see our methodology). Much below that and the San Marcos River gets low and bony, so you end up scraping gravel and walking the shallows; well above the top of the range it turns fast, cold and pushy, which is a more serious day than most casual boaters want. We read USGS gauge 08170500 about every 30 minutes and compare the live number to that window, so the verdict at the top of this page reflects conditions right now rather than a monthly average.

This reach can run year-round in a typical year, though levels still swing with rain and dry spells — the live gauge always beats the calendar, so check today's reading before you load the car.

7-day flow trend

Daily mean flow (cfs), past 7 days. Shaded band = runnable range.

Section facts

Difficulty: Class I
Length: 4 mi
Float time: ~2.5 hr
Best months: Year-round
Put-in: City Park / Rio Vista, San Marcos ↗
Take-out: IH-35 / Thompson's Islands

Reading USGS gauge 08170500 — San Marcos Rv at San Marcos, TX ↗ · runnable range is an estimate (see methodology)

FAQ

What water level is good for paddling San Marcos River — City Park (Rio Vista)?: This section is generally runnable at 80–600 cfs (a conservative estimate — see our methodology). Below that it gets too low and bony; well above the top of the range it becomes pushy and then dangerous. We compare the live USGS reading to that range to produce today's verdict.
How do I check San Marcos River levels?: We read USGS gauge 08170500 — the same public data USGS publishes — about every 30 minutes and compare it to the runnable range for this reach. You can also view the raw gauge yourself at waterdata.usgs.gov.
Is San Marcos River — City Park (Rio Vista) good for beginners?: This section is rated Class I. At good levels it suits confident beginners and up, but it can have riffles or small rapids. Scout anything you can't see, and stay off it at high water.
When is the best time to paddle San Marcos River here?: Typically Year-round, when flows are most reliable for this section. Spring can run high after rain or snowmelt; late summer can drop too low. Always check today's gauge reading rather than assuming.
How long does it take to float San Marcos River — City Park (Rio Vista)?: This reach is about 4 miles, roughly 2.5 hours at a relaxed pace. Higher water is faster; low water and headwinds are slower. Add time for stops.

Nearby sections

Good to paddle · 107 cfs