Gary Giacomini Open Space Preserve
Boulder Springs Trail & Caterpillar Trail via San Geronimo Ridge Road
3.4 mi · ▲ 944 ft · 1 hr 36 min
Boulder Springs Trail & Caterpillar Trail via San Geronimo Ridge Road is a 3.4-mile out-and-back in Gary Giacomini Open Space Preserve near Lagunitas, CA. It climbs 944 ft, with sections as steep as 37% grade. It scores 28/100 on the Ambleway Wildness scale: green fringe.
Elevation
Getting there
Directions
Boulder Springs Trail & Caterpillar Trail via San Geronimo Ridge Road
3.4 mi · ▲ 944 ft · 1 hr 36 min
Elevation 278–1,209 ft
Out & Back · Gary Giacomini Open Space Preserve
Trailhead: 38.01156, -122.70020
Weather Aug 3: Clear, high 88°F / low 58° · precip 0% · wind 4 mph · sunrise 6:16 AM · sunset 8:19 PM
Transit-accessible: Sir Francis Drake Boulevard & West Cintura Avenue stop 128 m from the trailhead
- Start at the trailhead, heading SE.
- 0.7 miSharp right onto Caterpillar Trail, heading SW.
- 50 ftTurn left, heading SW.
- 0.1 miSharp left onto San Geronimo Ridge Road, heading SE.
- 0.5 miTurn left onto Boulder Springs Trail, heading E.
- 50 ftBear right onto San Geronimo Ridge Road, heading NE.
- 0.4 miReach Caterpillar Trail, then turn around and head back the way you came.
- 0.4 miBear left onto Boulder Springs Trail, heading SW.
- 50 ftTurn right onto San Geronimo Ridge Road, heading SW.
- 0.4 miSharp right, heading SW.
- 0.1 miTurn right onto Caterpillar Trail, heading N.
- 50 ftSharp left, heading N.
- 0.7 miArrive back at the trailhead.
Each distance is the walk from the previous step. Tap a step for a map of its junction.
Trail surface
Weather
Sunset
The best sunset spot on this hike is 1.2 mi in (~52 min). Leave by 7:07 PM for the 8:19 PM sunset. Back at your car by 9:04 PM, after dark — bring a headlamp.
Good to know
- Transit-accessible: Sir Francis Drake Boulevard & West Cintura Avenue stop 128 m from the trailhead
Other ways to reach this destination
More from this trailhead
- Kent Lake–Caterpillar Trail, 5 sights 5.2 mi · ▲ 1,497 ft
- Boulder Springs Trail–Caterpillar Trail, 4 sights 6.8 mi · ▲ 1,756 ft
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