AMBLEWAY Wildest hikes

Gary Giacomini Open Space Preserve

Boulder Springs Trail & Manzanita Fire Road via San Geronimo Ridge Road

3.1 mi · ▲ 849 ft · 1 hr 27 min

Boulder Springs Trail & Manzanita Fire Road via San Geronimo Ridge Road is a 3.1-mile out-and-back in Gary Giacomini Open Space Preserve near Forest Knolls, CA. It climbs 849 ft, with sections as steep as 20% grade. It scores 40/100 on the Ambleway Wildness scale: green fringe.

Elevation

0 mi466 – 1,211 ft · steepest grade: 20%3.2 mi

Getting there

Trailhead: Cortez Fire Road 38.01322, -122.68162
Nearest town Forest Knolls, CA
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Directions

AMBLEWAYwww.ambleway.com

Boulder Springs Trail & Manzanita Fire Road via San Geronimo Ridge Road

3.1 mi · ▲ 849 ft · 1 hr 27 min

Elevation 467–1,209 ft

Out & Back · Gary Giacomini Open Space Preserve

Trailhead: Cortez Fire Road · 38.01322, -122.68162

Weather Aug 3: Clear, high 91°F / low 58° · precip 0% · wind 6 mph · sunrise 6:16 AM · sunset 8:19 PM

Transit-accessible: Sir Francis Drake Boulevard & Lagunitas School Road stop 588 m from the trailhead

  1. Start on Cortez Fire Road, heading S.
  2. 0.2 miSharp left, heading N.
  3. 500 ftSharp right onto Manzanita Fire Road, heading S.
  4. 0.9 miTurn right onto San Geronimo Ridge Road, heading W.
  5. 0.4 miBear left onto Boulder Springs Trail, heading NE.
  6. 50 ftReach Manzanita Fire Road, then turn around and head back the way you came.
  7. 50 ftBear right onto San Geronimo Ridge Road, heading N.
  8. 0.4 miTurn left onto Manzanita Fire Road, heading E.
  9. 0.9 miSharp left, heading N.
  10. 450 ftSharp right onto Cortez Fire Road, heading S.
  11. 0.2 miArrive back at the trailhead.

Each distance is the walk from the previous step. Tap a step for a map of its junction.

Trail map, photos and weather for this hike: www.ambleway.com/hikes/boulder-springs-trail-manzanita-fire-road-out-back-5-km-8be2

Trail surface

100% unspecified

Weather

ClearTemperature 91°F58°
Precip0%Wind6 mphUV8Humidity49%
Hourly temperature
95°55°
Sunrise 6:16 AM12 AM3 AM9 AM12 PM3 PM6 PMSunset 8:19 PM
Tue 76°54°
Wed 74°54°
Thu 82°52°
Fri 87°51°
Sat 86°51°
Sun 81°51°

Sunset

The best sunset spot on this hike is 1.0 mi in (~44 min). Leave by 7:15 PM for the 8:19 PM sunset. Back at your car by 9:00 PM, after dark — bring a headlamp. Trailhead visible from the viewpoint

More sunset hikes nearby

Good to know

  • Transit-accessible: Sir Francis Drake Boulevard & Lagunitas School Road stop 588 m from the trailhead

Other ways to reach this destination

More from Cortez Fire Road Trailhead

Hikes near Forest Knolls, California