Live in the Los Angeles region and love summiting peaks? Then here's a must-do peak challenge. Includes all peaks over 5,000 ft high with 1,000 ft prominence in an area easily accessible from the LA area. Approximate geographic boundaries are: Santa Monica to the west, edge of the San Gabriel and San Bernardino ranges to the north, edge of the San Bernardino, San Jacinto, and Santa Rosa ranges to the east, and roughly the San Diego county line to the south.
Highest peak
San Gorgonio Mountain
11,499 ft / 3,504 m
Most prominent peak
San Jacinto Peak
8,319 ft / 2,535 m prom
Most summited peak
Mount San Antonio
581 summits
Most difficult peak
San Gorgonio Mountain
Class 1
Difficulty breakdown
Class 1/2 10 peaks
Highlights
Latest summits

"Another unplanned ascent of San Jacinto. We went up the Marion Mountain Trail to Deer Springs, and to the summit. There was about 3-4 inches of snow the whole way. My first time on The Marion Mountain Trail, and while shorter, it was steeper. And of course it seemed steeper on the way down in the dark. A great day!" — Mojavewanderer • Dec 2, 2023

"Started on the Ramona Trail. After about 3.5 miles, it picks up dirt roads and continued to Thomas Mountain. After the visit, I continued on to Little Thomas Mountain. That was my turnaround point and headed back." — MikeTeeples • Oct 14, 2023

"Before reaching the vehicle gate on Mount Disappointment Road, a single track trail leads up a gully. The trail climbs for about 1,000 feet of gain while paralleling the road at points. I climbed San Gabriel Peak first, followed by Mount Disappointment, then Mount Deception. After the third peak, I took the road back to the parking area, creating a semi-loop hike." — MikeTeeples • Oct 8, 2023

"Camped overnight at Manker Flats. Broke camp at 0800 and hit the trailhead at 0830.
Plan was to take Devil's Backbone on the way up, including the detour to bag Mt Harwood, with an option to bag West Baldy as well. Given my penchant for missing turns, I purchased a smartwatch before this trip (Garmin Epix Pro) so I could navigate without needing to pull my phone out.
Conditions were great -- plenty of shade at the start with pleasant temps and a cool breeze. Had the mountain pretty much to myself on the ascent; only came across one small group who were on their way down.
Devil's Backbone granted great views of the desert to the north and hazy views of San Gorgonio to the east. Made it to Harwood around 1100. As I rejoined the main Backbone trail to make the final push to Baldy, my right calf threatened to cramp up and I realized my left hamstring wasn't far behind. I paused to load up on calories and electrolytes then proceeded in a relatively delicate fashion.
Summited right at 1200 and all at once, doing this on a Thursday paid off -- I had the summit to myself. Two other hikers summited right after me via Baldy Bowl and we exchanged photos before they descended. Spen..." — colin • Sep 14, 2023

"Mtb and hike clean out of Holcomb valley area. Got rained on for first two hours quite unexpectedly, but skies cleared for hike up arctic point. Took HPS route 3. It’s steep and not much of a trail but it went decently the whole way up. Clouds parted near the top for an amazing view of San Gorgonio. 10 mile ride it back to town" — edg • Sep 2, 2023