WATERLANDSSign in
Texas Rivers
Live Conditions

San Marcos River

Texas42 miles4 Segments · 4 Rapids
Primary Flow
—
cfs
Gauge Height
—
ft
Water Temp
—
°F
Air Temp
—
°F
Basin SWE
—
in avg
Daylight
—
sunrise
5-Day Trend
—
 

River Profile

42 mi
Headwater
Mouth
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 0.2 mi
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 0.5 mi
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 0.1 mi
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 0.3 mi
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 0.5 mi
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 3.4 mi
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 5.3 mi
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 0.2 mi
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 5 mi
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 8.8 mi
San Marcos → San MarcosSan Marcos boat ramp → San Marcos boat ramp · 5.6 mi
San Marcos → Luling Zedler Mill Paddling Trail Initial Access State Highway 90 River CrossingSan Marcos boat ramp → Luling Zedler Mill Paddling Trail Initial Access State Highway 90 River Crossing · 5.8 mi
Luling Zedler Mill Paddling Trail Initial Access State Highway 90 River Crossing → Luling Zedler Mill Paddling Trail Access Take Out Zedler Mill ParkLuling Zedler Mill Paddling Trail Initial Access State Highway 90 River Crossing → Luling Zedler Mill Paddling Trail Access Take Out Zedler Mill Park · 6.1 mi
0
10
20
30
40
Gauge(3)
Boat Ramp(16)
Rapid(4)
Whitewater
Loading...

Loading map...

30-Day Flow History

Loading flow data...
7-Day Outlook

Forecast

14-day on Pro
Your History · San Marcos River

Track your history

Sign in to track your sessions on the San Marcos River: best days, monthly trends, and a leaderboard of your rivers.

Sign in
Gauge Stations
3 mainstem · live, 48h
USGS · Live
San Marcos→
—cfs
—·
Martindale→
—cfs
—·
Luling→
—cfs
—·
Segments
13 segments
SegmentMilesRiver MileCFSStatusFloat Est.Rapids
San Marcos boat ramp → San Marcos boat ramp
0.2RM 0.1 – 0.3——0:03hrs—
San Marcos boat ramp → San Marcos boat ramp
0.5RM 0.3 – 0.8——0:09hrs—
San Marcos boat ramp → San Marcos boat ramp
0.1RM 0.8 – 0.9——0:02hrs1max II
San Marcos boat ramp → San Marcos boat ramp
0.3RM 0.9 – 1.2——0:05hrs1max II
San Marcos boat ramp → San Marcos boat ramp
0.5RM 1.2 – 1.7——0:09hrs—
San Marcos boat ramp → San Marcos boat ramp
3.4RM 1.7 – 5.1——0:58hrs—
San Marcos boat ramp → San Marcos boat ramp
5.3RM 5.1 – 10.4——1:31hrs3max II
San Marcos boat ramp → San Marcos boat ramp
0.2RM 10.4 – 10.6——0:03hrs—
San Marcos boat ramp → San Marcos boat ramp
5.0RM 10.6 – 15.6——1:26hrs—
San Marcos boat ramp → San Marcos boat ramp
8.8RM 15.6 – 24.4——2:31hrs—
San Marcos boat ramp → San Marcos boat ramp
5.6RM 24.4 – 30.0——1:36hrs—
San Marcos boat ramp → Luling Zedler Mill Paddling Trail Initial Access State Highway 90 River Crossing
5.8RM 30.0 – 35.8——1:39hrs—
Luling Zedler Mill Paddling Trail Initial Access State Highway 90 River Crossing → Luling Zedler Mill Paddling Trail Access Take Out Zedler Mill Park
6.1RM 35.8 – 41.9——1:45hrs—

Quick Facts

Total Length
42 miles
Gauge Stations
3
Segments
4
Rapids
4
Boat Ramps
15
Access Sites
17

Elevation Profile

Elevation data not yet available for this river.

Boat Ramps & Access

5 sites · 3 boat ramps
  • RM 0

    San Marcos boat ramp

    Boat rampTexas Parks and Wildlife Department
  • RM 6

    San Marcos River Retreat

    Fishing accessTexas Parks and Wildlife Department
  • RM 9

    Scull Rd Bridge Access

    Fishing accessTexas Parks and Wildlife Department
  • RM 36

    Luling Zedler Mill Paddling Trail Initial Access State Highway 90 River Crossing

    Boat rampTexas Parks and Wildlife Department
  • RM 42

    Luling Zedler Mill Paddling Trail Access Take Out Zedler Mill Park

    Boat rampTexas Parks and Wildlife Department
Fishing Intel

Current Hatches

No hatch calendar on file for this river yet.

Recommended Flies — Early November

No recommended flies on file for this river yet.

Float time estimates
  • San Marcos boat ramp → San Marcos boat ramp
    0.2 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → San Marcos boat ramp
    0.5 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → San Marcos boat ramp
    0.1 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → San Marcos boat ramp
    0.3 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → San Marcos boat ramp
    0.5 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → San Marcos boat ramp
    3.4 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → San Marcos boat ramp
    5.3 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → San Marcos boat ramp
    0.2 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → San Marcos boat ramp
    5 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → San Marcos boat ramp
    8.8 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → San Marcos boat ramp
    5.6 mi
    --
    --:--
    hrs:min
  • San Marcos boat ramp → Luling Zedler Mill Paddling Trail Initial Access State Highway 90 River Crossing
    5.8 mi
    --
    --:--
    hrs:min
  • Luling Zedler Mill Paddling Trail Initial Access State Highway 90 River Crossing → Luling Zedler Mill Paddling Trail Access Take Out Zedler Mill Park
    6.1 mi
    --
    --:--
    hrs:min

Notable Rapids

II

Rio Vista Whitewater Park

River mile 0.9

II

Old Mill

River mile 5.8

II

Broken Bone

River mile 6.9

II

Cottonseed

River mile 8.3

Season Timing
Fishing
Floating
Runoff
J
F
M
A
M
J
J
A
S
O
N
D

Regulations & Alerts

Spring Runoff Advisory

Water levels rising due to snowmelt. Exercise caution on all sections.

Browns Canyon National Monument

Special management area. No motorized boats permitted.

Catch & Release

Browns Canyon section: catch & release only for all trout species.

Bag & Possession Limits

Standard CO regulations: 4 trout per day, only 1 over 16".

Shuttle Distances

San Marcos boat ramp→San Marcos boat ramp

0.2 mi

river miles (driving distance varies)

San Marcos boat ramp→San Marcos boat ramp

0.5 mi

river miles (driving distance varies)

San Marcos boat ramp→San Marcos boat ramp

0.1 mi

river miles (driving distance varies)

San Marcos boat ramp→San Marcos boat ramp

0.3 mi

river miles (driving distance varies)

San Marcos boat ramp→San Marcos boat ramp

0.5 mi

river miles (driving distance varies)

San Marcos boat ramp→San Marcos boat ramp

3.4 mi

river miles (driving distance varies)

San Marcos boat ramp→San Marcos River Retreat

0.6 mi

river miles (driving distance varies)

San Marcos River Retreat→Scull Rd Bridge Access

3 mi

river miles (driving distance varies)

Scull Rd Bridge Access→San Marcos boat ramp

1.7 mi

river miles (driving distance varies)

San Marcos boat ramp→San Marcos boat ramp

0.2 mi

river miles (driving distance varies)

San Marcos boat ramp→San Marcos boat ramp

5 mi

river miles (driving distance varies)

San Marcos boat ramp→San Marcos boat ramp

8.8 mi

river miles (driving distance varies)

San Marcos boat ramp→San Marcos boat ramp

5.6 mi

river miles (driving distance varies)

San Marcos boat ramp→Luling Zedler Mill Paddling Trail Initial Access State Highway 90 River Crossing

5.8 mi

river miles (driving distance varies)

Luling Zedler Mill Paddling Trail Initial Access State Highway 90 River Crossing→Luling Zedler Mill Paddling Trail Access Take Out Zedler Mill Park

6.1 mi

river miles (driving distance varies)

Create a free account to save favorites, set flow alerts, and track conditions

Sign up free