Pick a trailhead
East (Black Mountain Road) and west (Sorrento Valley Boulevard) are both about three miles from the falls. East has more shade early; west is faster to reach from the coast and I-5.
Los Peñasquitos Canyon Waterfall
A flat six-mile round trip to the only easy waterfall in San Diego — when it's running.
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Quick answer
The Los Peñasquitos Canyon waterfall is a small cascade over volcanic rock roughly three miles in from either end of the canyon preserve, making it about a six-mile round trip on a wide, nearly flat trail with real oak and sycamore shade — unusual for San Diego. The east trailhead off Black Mountain Road and the west trailhead off Sorrento Valley Boulevard both work, and both have free parking lots that open at 8am and close at sunset. The catch is water: this is a seasonal creek, so the falls run best from December through April after winter rain and can be reduced to still pools or dry rock by late summer. Because the trail is flat and shaded, it's one of the better long hikes in the county with kids, dogs on leash or a bike.
Trailheads and conditions
| Detail | Info |
|---|---|
| Round trip | ~6 miles, mostly flat |
| East trailhead | Black Mountain Road, free lot |
| West trailhead | Sorrento Valley Blvd, free lot |
| Gate hours | 8am to sunset |
| Best water | December to April |
| Dogs / bikes | Both allowed; dogs on leash |
Doing the hike
The trail itself
Wide dirt road with gentle grade the whole way, running beside the creek under oaks and sycamores. Very little climbing until the short rocky scramble down to the falls.
Local tip: Stay on the main track — the creek-side spurs get muddy and are hard on the banks.
The falls
A modest cascade over dark volcanic rock into pools, not a Yosemite moment. After a good rain it runs loud and the whole canyon is green; in September it can be a trickle.
Riding it instead
The flat fire road makes this a popular gravel and mountain bike out-and-back. Bikes and hikers share the trail, so keep dogs close.
Timing
After winter rain
One to three days after a real storm is the peak of this hike — full water, green canyon, cool air. It's also the muddiest, so expect wet shoes.
Spring mornings
March and April give you water plus wildflowers along the canyon floor and comfortable temperatures. The best all-around window.
Late summer
Water is often minimal and the open stretches get hot. If you go, start at 8am when the gates open and turn around before the heat.
Practical
- • Gates open at 8am and lock at sunset — cars left inside get locked in, so watch the time on the return leg.
- • Six miles is longer than families expect. With small kids, walk in a mile and turn around at the creek crossings instead.
- • Poison oak grows along the creek spurs. Stay on the main trail.
- • Rattlesnakes use this canyon heavily in warm months, including on the wide flat road.
Frequently asked
How long is the Los Peñasquitos waterfall hike?
About six miles round trip from either trailhead, on a wide and nearly flat trail. Most people take two and a half to three and a half hours including time at the falls.
When does the Los Peñasquitos waterfall have water?
It's seasonal. Expect the strongest flow from December through April after winter rain, and little to nothing by late summer and fall.
Is parking free at Los Peñasquitos Canyon Preserve?
Yes, both the Black Mountain Road and Sorrento Valley Boulevard lots are free. The gates open at 8am and lock at sunset.
Can you bring dogs to Los Peñasquitos Canyon?
Yes, on leash. The flat shaded trail is one of the better long dog walks in the county, though six miles is a lot for a small or older dog and there's no water source you should let them drink from.
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