Highlight • Summit
Cycling
5.0
(7)
Road cycling
5.0
(1)
San Bruno Mountain is a prominent fault-block horst rising directly out of the San Francisco Bay in northern San Mateo County, California. This significant natural landmark, with its highest point at Radio Peak reaching over 400 meters (1,300 feet), forms a dramatic backdrop to the cities of Brisbane, Colma, Daly City, and South San Francisco. Distinct from the nearby Santa Cruz Mountains, San Bruno Mountain is renowned for its unique geology and exceptional biodiversity, serving as a vital "island of…
This Highlight is in a protected area
Please check local regulations for:
Tips
June 10, 2022
Cycling
May 22, 2024
Road cycling
August 15, 2025
Mountain biking

In the know? Log-in to add a tip for other adventurers!
Sign up for free
Nearby routes
Best routes near San Bruno Mountain

33
riders
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

16
riders
31.0km
02:14
480m
480m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

12
riders
41.0km
02:52
610m
610m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
Details
Informations
Elevation 360 m
Weather
Powered by Foreca
Today
Saturday 9 May
17°C
11°C
0 %
Additional weather tips
Max wind speed: 37.0 km/h
Most visited during
January
February
March
April
May
June
July
August
September
October
November
December
San Bruno Mountain offers a range of trails, from paved roads to more rugged paths. While the main road to the summit can be steep, many trails are considered intermediate. The mountain shoots up significantly from sea level, so expect some elevation gain. It's advisable to check specific route details on komoot to match your fitness level.
Yes, dogs are generally permitted in San Bruno Mountain State Park, but they must be kept on a leash at all times. It's always a good idea to check the official park website for the most current regulations regarding dog access on specific trails or in certain areas.
The time required to hike to the summit varies depending on your starting point, chosen route, and pace. A round trip to Radio Peak from a common trailhead can take anywhere from 2 to 4 hours. Consider the elevation gain and your personal fitness when planning your hike.
While some trails can be steep, there are sections and shorter loops that are suitable for families. Look for trails with less elevation gain or paved sections for a more accessible experience. Always check trail descriptions for distance and difficulty before heading out with children.
San Bruno Mountain is a biodiversity hotspot, home to 14 species of rare or endangered plants, including the San Bruno Mountain Manzanita, and three endangered butterfly species: the Mission blue, Callippe silverspot, and San Bruno elfin butterfly. It's also a critical stop for migrating birds along the Pacific flyway, making it excellent for wildlife spotting.
Access to San Bruno Mountain State Park primarily relies on personal vehicles, as direct public transport routes to the main trailheads are limited. However, some bus lines operate in the surrounding cities (Daly City, South San Francisco) which might get you within walking or a short taxi distance of the park entrances. Checking local transit schedules is recommended.
San Bruno Mountain can get busy, especially on clear weekends. To avoid crowds, consider visiting on weekdays or earlier in the morning on weekends. While spring is popular for wildflowers, visiting in late fall or winter can offer quieter trails and crisp, clear views, though weather conditions should be monitored.
San Bruno Mountain is surrounded by urban areas like Daly City, South San Francisco, and Brisbane. You'll find a wide array of cafes, restaurants, and accommodation options in these nearby cities, typically within a 5-15 minute drive from the park entrances.
Parking is available at various trailheads and at the summit area via Radio Road. However, parking lots can fill up quickly, especially on weekends and holidays. Arriving early in the morning is highly recommended to secure a spot, particularly during peak seasons.
Beyond its natural beauty, San Bruno Mountain holds historical significance. At the summit, you can find the remains of an old Nike Missile early warning radar site, a relic from the Cold War era. The mountain also has a rich history tied to the Ramaytush-speaking Ohlone peoples and Spanish explorers.
Due to its elevation and proximity to both the Pacific Ocean and San Francisco Bay, San Bruno Mountain experiences diverse microclimates. Expect conditions to change rapidly; it can be foggy and windy, even on days when nearby areas are clear. Dressing in layers is essential, and checking the local forecast before your visit is always a good idea.