Ring Mountain Open Space

Ring Mountain Open Space

Marin County Parks Open Space Leash Policy: Dogs on leash are welcome to enjoy trails. Dogs are allowed off-leash under strict voice control on fire protection roads. Please follow posted rules.

This windswept ridge high atop the Tiburon Peninsula is truly one of the most valuable pieces of real estate on this planet.

The battle to preserve Ring Mountain serves as a shining example of how the efforts of a few determined individuals can ultimately benefit future generations.

Due to the efforts of concerned citizens (led by local conservationist Phyllis Ellman) this area was saved from development when it was purchased by the Nature Conservancy. In 1995, the land (367 acres) was deeded over to MCOSD.

The unique geology and microclimate of this location provide a home for a number of rare plants. The soils on the ridge are heavily laced with the mineral serpentine. Soils derived from this mineral are toxic to most plants, but a number of species have evolved mechanisms to survive on serpentine.

As a result, where serpentine soils are found, there are usually isolated populations of rare plants. The most extreme example of this phenomenon is the Tiburon Mariposa Lily, which is found on the upper slopes of Ring Mountain, and nowhere else on earth.

There are several access points to the trails on this preserve, but the best approach is to start at the trailhead on Paradise Drive and follow the Phyllis Ellman Loop Trail to the top.

During spring, the wildflowers along the way can be breathtaking, as are the views of San Francisco and the entire Bay Area at your feet.

• Parking: Roadside parking available.
• Water: Bring your own.
• Best time of the year to hike: Beautiful year round.
• Degree of difficulty: Easy
• Distance: 3.7 miles Hours of operation: Sunrise to sunset
• Dogs are permitted on leash only

Directions:
• North access: from Highway 101 in Corte Madera, take the exit for Tamalpais Drive east. Go straight onto San Clemente, which merges into Paradise Drive after 0.4 miles. Follow Paradise Drive approximately 1 mile (go past Westward Drive). The gate is on the right.

• South access: from Highway 101 in Mill Valley, take the exiit for East Blithedale Ave. Go east on Tiburon Boulevard and turn left at Reed Ranch Road. MCOSD gate is at the end.

• East access: from Highway 101 in Corte Madera, take the exit for Tamalpais Drive east. Go straight onto San Clemente, which merges into Paradise Drive after 0.4 miles. Follow Paradise Drive approximately 1.7 miles, turn right onto Taylor Road, and follow to end (dead end).

Help us keep this trail beautiful and dog-friendly:
• Always follow the posted rules as they may have changed
• If in off-leash area, keep your dog under voice command
• Respect and protect wildlife and habitats
• Pack in and pack out, leaving only paw prints