San Geronimo Ridge and Kent Lake Loop
San Geronimo Ridge and Kent Lake Loop
4.9
(3023)
18,208
runners
02:27
17.6km
660m
Running
Difficult 11.0 miles (17.6 km) jogging loop through diverse terrain and scenic views of Kent Lake in the Mount Tamalpais Watershed.
Last updated: February 26, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
Samuel P. Taylor State Park
Waypoints
Start point
Parking
Get Directions
3.72Β km
Highlight (Segment) β’ Trail
11.0Β km
Highlight β’ Viewpoint
Tip by
12.9Β km
Highlight (Segment) β’ Viewpoint
Tip by
16.0Β km
Highlight (Segment) β’ Lake
Tip by
17.6Β km
End point
Parking
Way Types & Surfaces
Way Types
9.66Β km
7.48Β km
273Β m
201Β m
Surfaces
9.57Β km
7.41Β km
273Β m
201Β m
169Β m
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Elevation
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Weather
Powered by Foreca
Wednesday 8 July
22Β°C
9Β°C
0Β %
Additional weather tips
Max wind speed: 17.0Β km/h
to get more detailed weather forecasts along your route
This route was planned by komoot.
While specific parking areas aren't detailed, trailheads for this loop are typically found within the Mount Tamalpais Watershed area. It's advisable to check the Marin County Parks website (marincounty.gov) for the most current information on designated parking lots and access points.
Yes, dogs are generally allowed on these trails. Typically, they should be on-leash on singletrack trails and can be under voice command on fire roads. Always be mindful of other trail users and local regulations.
The trails are generally accessible year-round. However, conditions vary: summers can lead to 'buffed out and hard' trails, while wet winters can make them 'sloppy and muddy'. Spring offers the bonus of wildflowers at lower elevations.
The Mount Tamalpais Watershed, where this trail is located, is managed by the Marin Municipal Water District. Generally, there are no specific permits or entrance fees required for day use of the trails. However, it's always a good idea to check the official Marin County Parks website (marincounty.gov) for any updated regulations or special permits that might be needed.
This loop is rated as 'difficult' for jogging on komoot, and research indicates it ranges from moderate to hard due to significant elevation changes. While some sections offer gentle ascents, others can be very steep. It might be challenging for absolute beginners, but those with some jogging experience and good fitness could manage it.
You'll encounter a diverse mix of surfaces. Expect dirt and gravel fire roads, which can sometimes be 'nasty loose at parts with baby heads' (small rocks). There are also sections of light singletrack. Some fire roads are well-maintained, while other areas can be more rugged. Conditions can change with the seasons, becoming hard and buffed out in dry months or muddy when it rains.
The komoot tour estimates a duration of approximately 2 hours and 27 minutes for jogging the 17.6 km (10.9 miles) loop. Keep in mind this is an estimate, and your actual time may vary based on your pace and stops.
The loop offers beautiful scenery, including sweeping views of Kent Lake and surrounding valleys. You'll pass through dense forests, lush redwood groves, and grassy meadows. Notable viewpoints include Green Hill overlook and sections of San Geronimo Ridge. The area is rich in diverse trees like redwood, madrone, Douglas-fir, oak, and bay.
This trail system is often described as less popular than other Marin trails, offering 'lighter traffic' and 'little to no people around'. If you're looking for a more secluded experience, this loop could be a great choice.
Yes, the route features several highlights. You'll traverse sections of the Caterpillar - Contour Trails, enjoy views from Green Hill overlook and San Geronimo Ridge, and experience the beauty of Kent Lake.
Yes, the route integrates with a broader network of trails. You'll find yourself on sections of the Bay Area Ridge Trail - 01 - North Bay, San Geronimo Ridge Road, Hunt Camp Trail, Manzanita Fire Road, Contour Trail, Caterpillar Trail, and Upper Peters Dam Road, among others.
During dry months, especially summer, the trails can become 'buffed out and hard'. In contrast, when it rains, particularly in winter, sections can become 'sloppy and muddy'. Always check recent conditions before heading out, especially after heavy rainfall.
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