AMBLEWAY Wildest hikes
200mp - 1010 Panoramic Hwy Mill Valley, California.jpg
Meiko21 · CC BY-SA 4.0
Mount Tamalpais Watershed

Gravity Car Road & Hoo-Koo-E-Koo Fire Road via Old Railroad Grade Fire Road

3.7 mi · ▲ 972 ft · 1 hr 43 min

Gravity Car Road & Hoo-Koo-E-Koo Fire Road via Old Railroad Grade Fire Road is a 3.7-mile out-and-back in Mount Tamalpais Watershed near Mill Valley, CA. It climbs 972 ft, with sections as steep as 24% grade. It scores 25/100 on the Ambleway Wildness scale: green fringe.

Elevation

0 mi909 – 1,440 ft · steepest grade: 24%4.0 mi

Getting there

Trailhead: Tamelpa Trail 37.91994, -122.56388
Nearest town Mill Valley, CA
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Directions

AMBLEWAYwww.ambleway.com

Gravity Car Road & Hoo-Koo-E-Koo Fire Road via Old Railroad Grade Fire Road

3.7 mi · ▲ 972 ft · 1 hr 43 min

Elevation 910–1,442 ft

Out & Back · Mount Tamalpais Watershed

Trailhead: Tamelpa Trail · 37.91994, -122.56388

Weather Aug 3: Clear, high 95°F / low 64° · precip 0% · wind 5 mph · sunrise 6:16 AM · sunset 8:18 PM

  1. Start on Tamelpa Trail, heading W.
  2. 0.3 miTurn left onto Hoo-Koo-E-Koo Fire Road, heading SW.
  3. 0.4 miSharp right onto Old Railroad Grade Fire Road, heading NW.
  4. 0.6 miTurn left onto Hogback Road, heading S.
  5. 0.3 miSharp right onto Matt Davis Trail, heading S.
  6. 50 ftTurn left onto Hogback Road, heading S.
  7. 0.2 miSharp left, heading SE.
  8. 250 ftTurn right onto Gravity Car Road, heading E.
  9. 450 ftReach Hoo-Koo-E-Koo Fire Road, then turn around and head back the way you came.
  10. 500 ftTurn left, heading SE.
  11. 250 ftSharp right onto Hogback Road, heading N.
  12. 0.2 miTurn right onto Matt Davis Trail, heading N.
  13. 50 ftSharp left onto Hogback Road, heading N.
  14. 0.3 miTurn right onto Old Railroad Grade Fire Road, heading N.
  15. 0.6 miSharp left onto Hoo-Koo-E-Koo Fire Road, heading N.
  16. 0.4 miTurn right onto Tamelpa Trail, heading N.
  17. 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/gravity-car-road-out-back-f6be

Trail surface

49% dirt23% gravel28% unspecified

Weather

ClearTemperature 95°F64°
Feels like82°Precip0%Wind5 mphUV8Humidity30%
Hourly temperature
95°60°
Sunrise 6:16 AM12 AM3 AM9 AM12 PM3 PM6 PMSunset 8:18 PM
Tue 87°69°
Wed 83°54°
Thu 70°52°
Fri 73°50°
Sat 73°50°
Sun 66°50°

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