Running trails in San Marcos, TX
San Marcos has 17 trails in the directory — 2 paved and 2 on crushed gravel or dirt, 3 loops that return to the trailhead, 9 with a stated distance, and 3 shaded. 13 of them post opening hours, so you can check the gate before an early start. They're ranked here by rating weighted by review volume, across 9,233 Google reviews. Filter by surface, loop, distance, shade or lighting to get to the run you're actually planning — no made-up difficulty score, just the facts you'd check before driving out.
Rio Vista Park
4.6 ★★★★★ 4,786 reviews
14-acre regional park featuring sports courts, a swimming pool, picnic areas & hiking/biking trails.
Five Mile Dam Park
4.4 ★★★★☆ 1,406 reviews
Destination for river swimming & boating, also offering walking trails & a soccer complex.
Purgatory Creek Natural Area
4.7 ★★★★★ 752 reviews
Recreation area with scenic overlooks & a trail system for hiking & biking, plus parking areas.
Stokes Park
4.4 ★★★★☆ 794 reviews
Green space centered around the San Marcos River offering walking trails & picnicking space.
William & Eleanor Crook Park
4.6 ★★★★★ 308 reviews
This riverside park with trails & picnic tables is a popular place for tubing, canoeing & kayaking.
Spring Lake Natural Area
4.7 ★★★★★ 265 reviews
A large tract of undeveloped meadow & wooded land featuring natural-surface trails.
Lower Purgatory Trailhead
4.6 ★★★★★ 231 reviews
Hiking, biking, and dog-walking spot featuring challenging routes through scenic terrain.
Lime Kiln Trailhead
4.8 ★★★★★ 145 reviews
Area with trails for walking, hiking and biking, plus a pond with ducks.
Upper Purgatory Trailhead
4.7 ★★★★★ 115 reviews
Area offering hiking trails that are good for kids and strollers.
Ringtail Ridge Natural Area
4.7 ★★★★★ 114 reviews
Relaxing park featuring clean trails for hiking and dog-walking, plus benches.
Prospect Park
4.6 ★★★★★ 73 reviews
Natural setting offering rugged, wooded trails for walks, hikes, mountain biking & wildlife viewing.
Schulle Canyon Natural Area
4.6 ★★★★★ 70 reviews
Set on an undeveloped landscape, this 21-acre area offers nature trails & native wildlife views.
Blanco Shoals Natural Area
4 ★★★★☆ 68 reviews
Undeveloped natural park area on the Blanco River, with tall cottonwood & pecan trees & fish.
The Sundial
3.9 ★★★★☆ 16 reviews
No trails match those filters.
How to pick a trail in San Marcos
- Match the surface to your legs. San Marcos gives you a choice: 9 mixed, 2 paved, and 2 natural surface. Asphalt and concrete are fast, predictable and runnable year-round but the least forgiving; crushed limestone and dirt take the sting out of high mileage; boardwalk is flat and scenic but slick in the wet. If your shins or knees are complaining, the fix that actually works is varying the surface you run on rather than chasing one "best" one. More mixed trails →
- Loop or out-and-back? 3 trails here are loops, so you finish back at the car with no backtracking — the easiest way to run a set distance without thinking about it. On an out-and-back you turn round at half your target distance, which makes any trail fit any run. The longest stated distance in San Marcos is Purgatory Creek Natural Area at 22 mi. 9 trails are long enough for a 5-mile-plus run without repeating yourself.
- Check the hours before a 6am run. Plenty of trails sit inside parks that gate at dusk and don't unlock until well after sunrise, so a trail that's perfect at lunchtime can be locked at 6am. 13 of the 17 listings carry posted opening hours — worth a look before you set an alarm.
- Long run? Check water and restrooms first. 12 have trailhead parking, 11 have restrooms, and 7 have a water fountain in San Marcos. Anything over an hour and those stop being nice-to-haves — and in summer, shade counts double.
- The small things that decide it. 3 shaded, 3 with mile markers, 6 that runners describe as quiet, 14 dog-friendly, and 9 smooth and wide enough for a stroller or a wheelchair. Busy or quiet isn't a good-or-bad thing here: a busy path is the safer choice for a solo run at dawn, a quiet one is better for intervals.
More on all of this in the trail-running guides.
Browse San Marcos trails by type
Running trails near San Marcos
Worth the short drive — the closest towns with trails in the directory.