Gould Mesa Hiking Guide
The Arroyo Seco above Altadena is one of the gentlest ways into the San Gabriels, and Gould Mesa is the natural first destination. The trail follows the creek upstream on the Gabrielino Trail, crossing water a few times, passing through sycamore and oak shade, and arriving at a streamside trail camp with tables and shade about two and a half miles in. There is very little climbing, which makes it a rare front-range hike that works for almost anyone.
Access from Windsor Avenue
The usual start is at the north end of Windsor Avenue in Altadena, near the Jet Propulsion Laboratory, where a gate marks the entrance to the arroyo. Parking is on the residential street and is limited and signed — read the curbs and park considerately, as this is a neighborhood trailhead that has had access friction before. From the gate a paved service road drops into the canyon before the route becomes proper trail alongside the creek.
The Walk Upstream
The route follows the Arroyo Seco north, gaining only about three hundred feet over roughly two and a half miles, with the creek alongside for most of it. You cross the water several times on rocks or seasonal crossings — after heavy rain these can require wet feet or become genuinely difficult. The canyon holds sycamores, oaks, and alders, giving real shade through much of the route, which is unusual and welcome in the front range.
Gould Mesa Trail Camp
The destination is a Forest Service trail camp on a bench above the creek, with picnic tables, shade, and a pleasant open feel. It makes an excellent lunch stop and turnaround, and it is a popular first backpacking destination for families and beginners given the short, flat approach. Facilities are basic and conditions vary — treat any water source as requiring filtration and pack out everything you bring in, including food scraps.
Continuing Further
The Gabrielino Trail continues well beyond Gould Mesa, heading upstream toward Oakwilde and eventually connecting to the broader trail network reaching Switzer Falls and the high country. Those extensions add real distance and some rough sections where storm damage has affected the tread. Gould Mesa is the natural turnaround for a casual outing, but knowing the trail continues makes this a good place to start building toward longer canyon days.
Season, Water, and Conditions
Fall through spring is ideal, with winter and early spring offering the best creek flow and greenest canyon. Summer is tolerable thanks to the shade but the lower canyon still gets warm. After major storms the crossings can be impassable and sections of trail wash out — check recent conditions before relying on the route. Poison oak is present along the creek margins. Leashed dogs love this hike for the shade and water access, making it one of the better front-range dog outings.
Hiking tips for Gould Mesa
- Park considerately on the Windsor Avenue residential streets and read the posted restrictions; this trailhead has a history of access friction.
- Check conditions after major storms — the creek crossings can become impassable and sections of the tread wash out.
- Bring this hike out when you have mixed fitness in the group; the shade and near-flat grade suit almost everyone.
- Learn to identify poison oak before you go, since it grows thick along the creek margins through this canyon.
- Treat any water you take from the creek, including at the trail camp, rather than assuming it is safe to drink.
Nearby trails to explore
- Switzer Falls
- Echo Mountain
- Millard Falls
Hike this trail with TrailMates
Gould Mesa is the front range's friendliest canyon walk and a great first group hike. Use TrailMates to find Pasadena and Altadena hikers heading up the Arroyo Seco, including families and first-time backpackers. Download the TrailMates app to join.