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Running trails in San Marcos, CA
San Marcos has 16 trails in the directory — 5 paved, 1 with a stated distance, 4 shaded, and 2 open 24 hours. 11 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 4,259 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.
Double Peak Park
4.8 ★★★★★ 1,727 reviews
Rugged, 200-acre park featuring a play area & hiking trails that lead to a summit with ocean views.
Walnut Grove Park
4.6 ★★★★★ 510 reviews
Large park with athletic fields, trails, a picnic area, equestrian facilities & an events center.
Hollandia Park
4.6 ★★★★★ 446 reviews
Local park with lit ball & soccer fields, a horseshoe court, dog area & picnic shelter.
Lakeview Park
4.7 ★★★★★ 396 reviews
Relaxed park on a lake with picnic tables, a fountain and trails, plus playgrounds for the kids.
Discovery Lake
4.8 ★★★★★ 300 reviews
Family-friendly destination featuring paved walkways around a lake, playgrounds and a fountain.
Simmons Family Park
4.7 ★★★★★ 211 reviews
Peaceful park offering a playground, basketball court, hiking trail, and picnic tables, plus ocean views.
Ridgeline Trailhead
4.7 ★★★★★ 184 reviews
Hiking area with well-maintained trails that offer scenic views.
Knob Hill Park
4.4 ★★★★☆ 194 reviews
Shaded, clean, scenic park with swings and other play equipment, plus picnic tables and benches.
South Lake Park
4.4 ★★★★☆ 128 reviews
Pretty lake within a park that’s popular for hikes, leisurely jogs and dog-walking.
Quail Valley Park
4.3 ★★★★☆ 64 reviews
Park featuring a playground with slides, picnic tables, and walking trails, plus a field.
Mahogany Park
4.4 ★★★★☆ 29 reviews
Frank's Peak
4.1 ★★★★☆ 9 reviews
P Hill Trail - Access Point
4.3 ★★★★☆ 7 reviews
Canyon Trail Park
4.5 ★★★★★ 2 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: 5 paved and 4 mixed. 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 paved trails →
- Loop or out-and-back? A loop finishes back at the car with no backtracking; on an out-and-back you simply turn round at half your distance. The longest stated distance in San Marcos is South Lake Park at 1 mi.
- Check the hours before a 6am run. 2 trails in San Marcos are open 24 hours — the rest can sit inside a park that gates at dusk and doesn't unlock until well after sunrise. 11 of the 16 listings carry posted opening hours — worth a look before you set an alarm.
- Long run? Check water and restrooms first. 10 have trailhead parking, 9 have restrooms, and 4 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. 4 shaded, 7 that runners describe as quiet, 8 dog-friendly, and 4 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.