"Great news — all authorized trails in Los Peñasquitos Canyon Preserve are officially open again following the recent fire!" Senior Park Ranger Gina Washington posted that line on Friday, October 2, 2026, through the Friends of Los Peñasquitos Canyon Preserve. For many people in 92129 this ended a summer of planning walks around closures.
The reopening happened all at once, but the canyon you walk into is no longer one continuous experience. The burned area sits at the west end. The trailheads, historic buildings and nearly every scheduled event between now and mid-December are at the east end or around the edges. If you know where that line falls, you can choose the walk you're in the mood for: a familiar loop near the Ranch House, or a slower, roped-off look at a landscape starting to grow back.
Where the Line Falls
Two fires shaped the canyon this year. The first broke out on June 8, and the San Diego Union-Tribune reported it at 90 acres. Times of San Diego reported evacuations in the preserve and nearby homes close to where Interstates 5 and 805 meet. Fox 5 reported that every hiking trail in the preserve and on Del Mar Mesa closed during that response. The second, the Sorrento Fire, started on August 16 near Peñasquitos Creek between Sorrento Valley Boulevard and Carmel Mountain Road. CAL FIRE recorded it at 138 acres and fully contained on September 1. It also noted that some areas of the preserve stayed closed because of hazardous trees.
A September 13 update from Park Ranger Melanie Fontana mapped the damage on the ground. The two burn scars together cover more than 230 acres, and they run from the Waterfall west to Vista Sorrento Parkway. Several miles of authorized trail were damaged, including both the North and South Main Trails, Sidehill, and Big and Little Waimea. All of those needed fencing and some repair before they could reopen, and on that date every trail west of the Waterfall was still closed.
The Waterfall is the dividing point. West of it is the burned area. East of it is the stretch toward Black Mountain Road, where the canyon's main parking areas and historic buildings are.
What Changed West of the Waterfall
Since October 2, the fire-damaged trails are open again, but they look different. Washington's update says visitors will see yellow rope fencing through parts of the burn scar. The ropes keep people on authorized trails and protect new growth while the habitat recovers. She also reported more animal activity in the west end of the canyon.
The same update warns that trails may close for short periods while San Diego Fire-Rescue crews work on the access roads. Washington called these closures temporary and targeted. Since closures can happen on short notice, the City's advice is the most reliable check: call the Park Ranger Office at 858-538-8066 before you head out. No current official source says whether the Waterfall itself is flowing or gives a specific status for Wagon Wheel Crossing. Anyone planning a creek-crossing route on that side should call first.
Washington's update also mentioned an extreme heat warning for this first weekend of October. She asked visitors to bring plenty of water, skip the peak afternoon heat, and consider leaving dogs at home because they overheat easily.
Where to Start, by Entrance
The City lists four main ways into the preserve. Where each one sits relative to the burn scar decides what your walk will be like.
| Entrance | Location | Where it sits relative to the burn scar |
|---|---|---|
| East staging | Black Mountain Road and Mercy Road | Opposite end of the canyon from the scar |
| West staging | South of Sorrento Valley Boulevard, about a mile east of Vista Sorrento Parkway | Inside the stretch rangers described as burned |
| North entrance | Near Park Village Road and Camino del Sur | Along the canyon's northern edge |
| South entrance | Camino Ruiz Neighborhood Park | Along the canyon's southern rim |
The County lists the Black Mountain Road staging area at 12020 Black Mountain Road. It's open 8 a.m. to sunset daily, with walk-in access from sunrise to sunset and parking for both vehicles and horse trailers. If you want the canyon you remember, start here. If you want to see the burn scar, the west staging area off Sorrento Valley Boulevard puts you right in it.
The East End Has the Buildings
The Rancho de los Peñasquitos Ranch House anchors the east end. The County lists it at 12122 Canyonside Park Drive. The grounds and trails are open 8 a.m. to sunset daily. The museum and self-guided house visits run Friday through Tuesday, 9:30 a.m. to 4 p.m. Guided tours of the adobe start at 11 a.m. on Saturdays and 1 p.m. on Sundays, with the Sunday tour by request. The park's number is 858-484-7504.
Save Our Heritage Organisation calls this the Johnson-Taylor House and gives its historic address as 12020 Black Mountain Road. SOHO says the adobe dates to 1823, was enlarged in 1862, and later passed from the Johnson family to the Taylors. The Canyonside Park Drive and Black Mountain Road addresses point to the same property.
While the west end was closed this summer, this cluster of staging area, ranch house and Canyonside Park stayed the canyon's most-used entrance. Most of the fall calendar meets here too.
The Fall Calendar, in Order
Almost every scheduled canyon event before the end of the year meets at the east end or on the rims, not on the burned trails. Here is what the Friends and the County have posted, in date order:
- Arch in the Park, Saturday, October 17, 10 a.m. to 3 p.m. It's at the Canyonside Park driveway. The San Diego County Archaeological Society hosts this annual all-day, family-friendly event for California Archaeology Month, and the Friends will have a booth with information on upcoming guided hikes.
- Volunteer restoration, Sunday, October 18, 2 to 4 p.m. This work party is in Black Mountain Open Space Park, next door to the canyon. Meet at the northeast corner of Black Mountain Ranch Community Park, 14700 Carmel Valley Road, and look for a big white Ford F-150 4x4 truck past the gate. No experience is needed to plant, weed and water native plants that restore habitat for endangered birds and butterflies. Groups should RSVP to 858-863-7393. Questions go to organizer Mike Kelly.
- Volunteer restoration, Sunday, November 1. Same Black Mountain Open Space work party, same meeting spot.
- Camino Ruiz Rim-to-Creek hike, Saturday, November 7, 8 to 10 a.m. Naturalist Beth Mather leads it from Camino Ruiz Community Park, 11489 Camino Ruiz. The listing calls the route steep but shaded.
- Volunteer restoration, Sundays, November 15 and November 29, 2 to 4 p.m. At Black Mountain Ranch Community Park.
- Birding walk, Saturday, November 28, 7:45 to 10 a.m. Ornithologist Jeanie Anderson leads the walk. Meet at the preserve sign at the west end of the Canyonside Park driveway.
- Doug Hill hike, Saturday, December 12, 9 to 11 a.m. Beth Mather leads a two-mile hike that starts at Black Mountain Ranch Community Park, 14700 Carmel Valley Road.
- Volunteer restoration, Sundays, December 13 and December 27, 2 to 4 p.m. The last two work parties of the year, both at Black Mountain Ranch Community Park.
Arch in the Park and the November 28 birding walk both meet at the Canyonside Park driveway, a short walk from the Ranch House. The Camino Ruiz hike drops in from the southern rim, and the Doug Hill hike and the restoration sessions are north of the canyon in Black Mountain Open Space. None of the posted events start on the burned stretch between the Waterfall and Vista Sorrento Parkway.
Picking Your Walk This Season
Your starting point now sets what kind of outing you get. Park at Black Mountain Road, walk past the Ranch House, and you're on the familiar stretch of trail, with the museum open Friday through Tuesday and weekend adobe tours. Park off Sorrento Valley Boulevard and you'll be walking between yellow ropes. You'll see the same canyon the rangers described a month ago, now reopened, with more animal activity in the west end, regrowth they're asking visitors to protect, and occasional short closures while crews finish the access roads.
If you want to help with recovery hands-on, the Friends' afternoon restoration sessions in Black Mountain Open Space run through December 27. For the latest trail status on any given morning, call the Park Ranger Office at 858-538-8066.
If you live near one of these trailheads and have wondered how being close to the canyon shows up in what your home is worth, Tanya Williams can walk you through it calmly and clearly, with no pressure. Request Your Free Home Valuation, and we'll start with the Peñasquitos details that matter to you.
