Oak Manor, Smith Ridge, Sunrise and Old Railroad Grade Loop
Oak Manor, Smith Ridge, Sunrise and Old Railroad Grade Loop
4.8
(2641)
17,647
hikers
07:04
23.1km
770m
Hiking
This difficult 14.4-mile hiking loop in Loma Alta Open Space Preserve offers challenging climbs and expansive views of San Francisco.
Last updated: February 26, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
Waypoints
Way Types & Surfaces
Way Types
15.7 km
6.22 km
1.04 km
168 m
Surfaces
18.2 km
2.92 km
976 m
855 m
180 m
Sign up to see more specific route details
Sign up for free
Elevation
Highest point (430 m)
Lowest point (60 m)
Sign up to see more specific route details
Sign up for free
Weather
Powered by Foreca
Today
Wednesday 20 May
29°C
10°C
0 %
Additional weather tips
Max wind speed: 16.0 km/h
to get more detailed weather forecasts along your route
This route was planned by komoot.
You can typically find parking near the start of Oak Manor Fire Road, often accessible from Oak Manor Drive. Another common access point is via Glen Fire Road, which connects to Smith Ridge Fire Road. The route's official highlight, Glen Fire Rd Trailhead 🌳, is a good starting point.
Yes, the fire roads that make up this loop are generally dog-friendly. Dogs are typically allowed on leash within the Loma Alta Open Space Preserve. Always ensure your dog is under control and follow any posted regulations.
The best time to hike this loop is during the cooler months, from late fall to spring. After winter rains, the hills are vibrant green. Summer can be very warm, and much of the trail has limited shade, making sun protection and ample water essential. Clear days offer the best views.
No, there are no permits required or entrance fees to access the Loma Alta Open Space Preserve, where this loop is primarily located. It is open to the public for recreational use.
This is a challenging hike covering approximately 23 kilometers (14.4 miles) with significant elevation gain. On average, it takes about 7 hours and 47 minutes to complete, but this can vary based on your fitness level, pace, and how often you stop to enjoy the views.
The terrain primarily consists of fire roads, which can range from relatively flat to steep and twisting climbs. You'll encounter rolling hills characteristic of Marin County, with sections of chaparral and oak woodlands. Some parts are exposed, while others offer shade from oak trees.
Yes, the loop offers rewarding views, especially from Smith Ridge. On clear days, you can see San Francisco, parts of the Pacific Ocean, expansive areas of Marin County, and even Mount Diablo and other East Bay landmarks. The Glen Fire Rd Trailhead 🌳 is a key access point.
Yes, this route incorporates sections of several other trails. You'll traverse parts of the Bay Area Ridge Trail - 01 - North Bay, Old Railroad Grade, Smith Ridge Fire Road, and Sunrise Fire Road. A small portion also overlaps with the Sir Francis Drake Bike Route.
Given its length of over 23 kilometers and significant elevation gain of 770 meters, this loop is rated as difficult. It is not generally recommended for beginners. Hikers should have a good level of fitness and be prepared for a strenuous day on the trails.
For this challenging and exposed loop, you should bring plenty of water, especially on warm days, as facilities are limited. Sun protection (hat, sunscreen), sturdy hiking shoes, layers of clothing, snacks, and a map or GPS device are highly recommended. Trekking poles can also be helpful for the climbs and descents.
It's important to note that specific toilet facilities or reliable water sources may not be available directly along these fire road segments. Plan to carry all the water you need for the entire hike and use facilities before or after your trip.