The Best Fall Hikes in San Diego (and the Two Things Most Guides Won't Tell You)
Fall is the best hiking season in San Diego and it isn't close — the inland trails cool off, the backcountry oaks turn gold in November, and the crowds thin.
Overview
Summer hiking here is all about beating the heat. Fall flips it: the inland trails that cook you in July turn pleasant, the backcountry oaks go gold in November, and the crowds thin out after Labor Day. It's the stretch of the year when the whole county opens back up.
Two quick heads-ups before you lace up. Torrey Pines State Natural Reserve is closed through March 2027 for utility and accessibility work — the beach stays open, but the reserve trails are off the table all season. And fall is San Diego's fire season, not its rainy one: Santa Ana winds run October through December, and the Cleveland National Forest has fire-use restrictions in effect, so check the managing agency before any backcountry trip. Everything below was verified with those agencies in October 2026.
Here are five that are genuinely at their best right now, easiest to toughest — each with a link to our full guide.
Garnet Peak, Mount Laguna — The Fall Color One
About 4 miles round trip from the Pioneer Mail trailhead, moderate, topping out around 5,900 feet.
This is the hike that proves San Diego has a real autumn. Up in the Laguna Mountains, the California black oaks turn gold and amber in early-to-mid November, and the Garnet Peak summit drops away into the Anza-Borrego desert on one side and the county's mountain spine on the other — one of the biggest views in the region for the effort.
Why it's a great fall hike: Color peaks in the first half of November, not October, so time it. You'll want an Adventure Pass or federal recreation pass to park, layers for a summit that can start below freezing, and a look at the Cleveland National Forest alerts before you drive up — the Descanso district is under fire restrictions. Pair it with a stop in Julian on the way home.
Read the full guide: Garnet Peak, Mount Laguna →
Los Peñasquitos Canyon, Mira Mesa — The Easy, Shaded One
About 7 miles round trip to the falls and back, or any shorter out-and-back — flat, free, dog-friendly.
A wide, mostly level canyon under oaks and sycamores, leading to a small waterfall over volcanic rock. The tree cover is the point: it's one of the few inland trails that stays comfortable even on a warm October afternoon, and because it's flat and long, you can turn around anywhere.
Why it's a great fall hike: This is the pick for a day with kids, a dog, or anyone who wants distance without climbing. The "waterfall" is a trickle until winter rain arrives, so come for the canyon, not the falls, this time of year. Easy parking at multiple trailheads; the east entrance is off Black Mountain Road.
Read the full guide: Los Peñasquitos Canyon →
Annie's Canyon, Solana Beach — The Unusual One
About 2 miles round trip; the slot canyon itself is just a few hundred feet. Free.
The most unusual twenty minutes of hiking in the county: a narrow sandstone slot you climb up through, with ladders, a metal staircase, and sections tight enough that a daypack has to come off your back. It's one-way for a reason — two people can't pass inside.
Why it's a great fall hike: Cooler air makes the climb more comfortable, and the San Elijo Lagoon below is at its liveliest during the autumn bird migration. Go early on a weekday — there's a genuine queue at the slot on weekends, and it's not a fit for anyone claustrophobic or for a big group.
Read the full guide: Annie's Canyon Trail →
Cowles Mountain, San Carlos — The Classic Summit
About 3 miles round trip from Golfcrest, climbing to 1,593 feet — the highest point in the City of San Diego.
The most-hiked trail in the county, and fall is when it's actually enjoyable. There's no shade on Cowles, none, so the 360-degree summit view — downtown, the ocean, Mexico, the backcountry — is far better earned once the heat breaks.
Why it's a great fall hike: Go at sunrise or sunset rather than midday. Just remember daylight drops fast after the clocks change in early November, so bring a headlamp if you're chasing the sunset. The Golfcrest lot fills by 7 a.m. on weekends year-round; the Barker Way and Big Rock Park approaches are quieter.
Read the full guide: Cowles Mountain →
Sea Cliff Del Mar Bluffs — The Coastal One
About 5 miles round trip from Seagrove Park south to Torrey Pines State Beach, flat, on sand. Free, including the parking.
Sixty feet of sandstone bluff above the Pacific, with the Surfliner running along the top of it and nothing between you and the horizon. Start on the grass at Seagrove Park, drop down to the sand, and walk south toward the Torrey Pines cliffs for as far as you feel like. It is the officially designated coastal route through Del Mar and the easiest five miles on this list — no climbing, no switchbacks, just ocean the entire way.
Why it's a great fall hike: Autumn is when this walk is at its best — the summer crowds are gone, the light goes golden by four, and it faces due west with an unobstructed sunset. Check the tide before you go, because the southern section needs a low tide and you don't want to be caught against a cliff on a rising one. Park free all day at the Civic Center garage at 1050 Camino Del Mar and walk down through the village. Stay well back from the bluff edge, top and bottom — these are actively eroding cliffs — and never walk on the railway.
Read the full guide: Sea Cliff Del Mar Bluffs →
How I'd Pick Your Fall Hike
- Fall color, the real reason to go → Garnet Peak, Mount Laguna (first half of November)
- Easiest, shaded, good with kids or a dog → Los Peñasquitos Canyon, Mira Mesa
- Something genuinely different → Annie's Canyon, Solana Beach
- Classic city summit and sunset → Cowles Mountain, San Carlos
- Ocean the whole way, flat, and free to park → Sea Cliff Del Mar Bluffs
The rule of thumb for fall: check the forecast for the trailhead, not your house — a 72-degree beach day can be 90 inland well into October — and carry a headlamp from November on, because the sun sets early once daylight saving ends.
Want more ways to get outside this season? Browse our Get Outside guides and our neighborhood pages if you're scouting where a trailhead at the end of your street might actually be.
