AMBLEWAY Wildest hikes
Bon Tempe Lake by Bastique.jpg
Cary Bass · CC BY 2.0
Mount Tamalpais Watershed

Bon Tempe Lake via Alex Forman Trail

2.8 mi · ▲ 243 ft · 1 hr 3 min

Bon Tempe Lake via Alex Forman Trail is a 2.8-mile out-and-back in Mount Tamalpais Watershed near Fairfax, CA. The route reaches Bon Tempe Lake. It is mostly level, with 243 ft of elevation gain, and mostly dirt. It scores 76/100 on the Ambleway Wildness scale: genuinely wild.

Elevation

0 mi676 – 810 ft3.0 mi

Getting there

Trailhead: Bullfrog Fire Road 37.96638, -122.60510
Nearest town Fairfax, CA
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Directions

AMBLEWAYwww.ambleway.com

Bon Tempe Lake via Alex Forman Trail

2.8 mi · ▲ 243 ft · 1 hr 3 min

Elevation 676–810 ft

Out & Back · Mount Tamalpais Watershed

Trailhead: Bullfrog Fire Road · 37.96638, -122.60510

Weather Sep 20: sunrise 6:57 AM · sunset 7:12 PM

Toilets at the trailhead · Parking lot at the trailhead

  1. Start at the trailhead, heading NE.
  2. 150 ftTurn right onto Alex Forman Trail, heading SE.
  3. 0.3 miBear left onto Shaver Grade Road, heading E.
  4. 50 ftContinue straight onto Alex Forman Trail, heading E.
  5. 200 ftContinue straight onto Shaver Grade Road, heading SE.
  6. 50 ftContinue straight onto Alex Forman Trail, heading SE.
  7. 0.6 miPass Bon Tempe Lake.
  8. 0.2 miTurn right, heading SW.
  9. 300 ftSharp left, heading W.
  10. 0.2 miReach Bon Tempe Lake, then turn around and head back the way you came.
  11. 0.2 miSharp right, heading N.
  12. 0.8 miContinue straight onto Shaver Grade Road, heading W.
  13. 50 ftContinue straight onto Alex Forman Trail, heading NW.
  14. 200 ftContinue straight onto Shaver Grade Road, heading W.
  15. 50 ftBear right onto Alex Forman Trail, heading NW.
  16. 0.3 miTurn left, heading NW.
  17. 150 ftArrive 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/bon-tempe-lake-bon-tempe-lake-out-back-5-km-cb86

Trail surface

86% dirt14% unspecified

Weather

Sunrise 6:57 AMSunset 7:12 PM

Good to know

  • Toilets at the trailhead
  • Parking lot at the trailhead

Other ways to reach this destination

More from Bullfrog Fire Road Trailhead

Hikes near Fairfax, California