AMBLEWAY Wildest hikes

Blithedale Summit Open Space Preserve

H Line Fire Road–Old Railroad Grade Fire Road, 3 sights

5.3 mi · ▲ 1,370 ft · 2 hr 27 min

H Line Fire Road–Old Railroad Grade Fire Road, 3 sights is a 5.3-mile out-and-back in Blithedale Summit Open Space Preserve near Mill Valley, CA. It climbs 1,370 ft, with sections as steep as 19% grade. It scores 42/100 on the Ambleway Wildness scale: green fringe.

Elevation

0 mi213 – 909 ft · steepest grade: 19%5.5 mi

Getting there

Trailhead: Old Railroad Grade Fire Road 37.92105, -122.55544
Nearest town Mill Valley, CA
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Directions

AMBLEWAYwww.ambleway.com

H Line Fire Road–Old Railroad Grade Fire Road, 3 sights

5.3 mi · ▲ 1,370 ft · 2 hr 27 min

Elevation 215–910 ft

Out & Back · Blithedale Summit Open Space Preserve

Trailhead: Old Railroad Grade Fire Road · 37.92105, -122.55544

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 Old Railroad Grade Fire Road, heading N.
  2. 0.1 miSharp right onto H Line Fire Road, heading SE.
  3. 0.6 miTurn right onto Blithedale Ridge Fire Road, heading S.
  4. 1 miBear left, heading SE.
  5. 0.2 miBear left onto Maytag Trail, heading SE.
  6. 0.1 miSharp right onto Elinor Fr Road, heading NE.
  7. 250 ftBear left onto Maytag Trail, heading SE.
  8. 50 ftTurn right onto Elinor Fr Road, heading SE.
  9. 0.1 miBear left onto Warner Canyon Trail, heading S.
  10. 0.4 miReach Old Railroad Grade Fire Road, then turn around and head back the way you came.
  11. 0.4 miBear right onto Elinor Fr Road, heading E.
  12. 0.1 miTurn left onto Maytag Trail, heading S.
  13. 50 ftBear right onto Elinor Fr Road, heading E.
  14. 300 ftSharp left onto Maytag Trail, heading E.
  15. 0.1 miBear right, heading NW.
  16. 0.2 miBear right onto Blithedale Ridge Fire Road, heading NW.
  17. 1 miTurn left onto H Line Fire Road, heading NW.
  18. 0.6 miSharp left onto Old Railroad Grade Fire Road, heading S.
  19. 0.1 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/knob-hill-out-back-9-km-b1bf

Trail surface

57% dirt27% gravel16% 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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