San Marcos has some of the best hiking in North County San Diego, and most people drive right past it on the 78 without knowing. The trails here range from paved lakeside walks to lung-burning hill climbs with panoramic views of the ocean, mountains, and everything in between. Here are the five you should know.

1. Double Peak Park

Distance: 2.4 miles round trip | Difficulty: Moderate to hard | Elevation gain: ~500 ft

Double Peak is the signature hike in San Marcos. The summit sits at 1,644 feet and the view from the top is genuinely stunning - you can see the ocean to the west, Palomar Mountain to the east, and on clear days, all the way to Mexico and the Coronado Islands.

The trail itself is a steady climb on a wide fire road. It is not technical, but the grade is relentless in the second half. Go early in summer because there is zero shade. The parking lot at the base fills up on weekend mornings by 8 AM, so plan accordingly.

Pro tip: the sunset from the summit is one of the best in all of San Diego County. Bring a headlamp for the walk down.

2. Discovery Lake

Distance: 1.5 mile loop | Difficulty: Easy | Elevation gain: Minimal

Discovery Lake is the family-friendly option. A flat, paved loop circles the lake through San Elijo Hills. Strollers, bikes, dogs on leash - everyone is welcome. The lake has herons, egrets, turtles, and occasionally a coyote on the far shore minding its own business.

What makes Discovery Lake special is the surrounding trail network. From the lake loop, you can branch off onto dirt trails that connect to Double Peak, Franks Peak, and several unnamed ridgeline paths. The lake is the starting point for a whole network of hikes.

There are benches and a small playground area. The lot is off Double Peak Drive and rarely fills up except on perfect-weather Saturday mornings, which in San Marcos is most Saturdays.

3. Cerro de las Posas

Distance: 3 miles round trip | Difficulty: Moderate | Elevation gain: ~400 ft

This one flies under the radar compared to Double Peak, which is exactly why locals love it. Cerro de las Posas sits in the Twin Oaks Valley area and offers 360-degree views from the summit with a fraction of the crowd.

The trailhead is a bit hidden - look for the access point off Twin Oaks Valley Road near the water treatment plant. The trail winds through coastal sage scrub with wildflowers in spring. The final push to the top is steep but short.

This is the hike for people who want views without the Double Peak traffic. Weekday mornings here, you might not see another person.

4. Jack's Pond Park Trails

Distance: Variable, up to 3 miles of loops | Difficulty: Easy to moderate | Elevation gain: Gentle rolling

Jack's Pond is in the San Elijo Hills community and connects to a network of paths winding through preserved open space. The trails are a mix of paved and natural surface, weaving through native vegetation with occasional views of the surrounding valleys.

The park itself has a pond (seasonal), picnic areas, and a community garden. The trail system connects to Discovery Lake and eventually to Double Peak if you want to build a longer route. It is perfect for an after-work walk or a moderate morning hike.

Dogs are welcome on leash. The paths are well-maintained and clearly marked. This is the kind of trail system that makes living in San Elijo Hills feel like a genuine perk.

5. Lakeview Park Trail

Distance: 1 mile loop | Difficulty: Easy | Elevation gain: Minimal

Lakeview Park sits on the shores of Lake San Marcos and is more of a walk than a hike, but it is a beautiful one. The paved path circles a grassy park area with lake views, mature trees, and usually a few people fishing.

This is the spot for a low-key morning walk with coffee, an easy outing with young kids, or a lunchtime break if you work nearby. Lake San Marcos has a distinctly different vibe from the rest of SM - quieter, more established, with mid-century homes and that classic lake community feel.

Not going to challenge you physically, but that is not always the point. Sometimes you just want a nice walk by the water.

Trail Gear Worth Having

San Marcos trails are not backcountry expeditions, but a few things make the experience better:

The best part about hiking in San Marcos is that all of these trails are 10 minutes or less from anywhere in the city. You can be on a summit watching the sunset over the Pacific and be home in time for dinner. That is the appeal. No hour-long drive to trailheads. No all-day commitment. Just walk out your door and climb a hill.