1. Start on Corral Spring Trail, heading W.
2. 200 ftBear left onto Ridge Top Trail, heading SW.
3. 50 ftTurn left onto Briones to Mt. Diablo Regional Trail, heading S.
4. 0.4 miBear right onto Fossil Hill Trail, heading S.
5. 0.2 miTurn left onto Kovar Trail, heading SW.
6. 150 ftPass Fossil Hill.
7. 50 ftBear right onto Fossil Hill Trail, heading SE.
8. 0.4 miPass Bramhall Pond.
9. 350 ftTurn right onto Briones to Mt. Diablo Regional Trail, heading NE.
10. 0.5 miPass Willow Spring Pond.
11. 0.1 miTurn right, heading SE.
12. 0.9 miTurn left onto Ridge Top Trail, heading E.
13. 0.7 miTurn left onto Costanoan Trail, heading W.
14. 350 ftBear left onto Ridge Top Trail, heading E.
15. 50 ftBear right onto Costanoan Trail, heading E.
16. 0.3 miPass Sulphur Creek Pond.
17. 450 ftBear left onto Ginder Gap Loop Trail, heading NW.
18. 300 ftSharp right onto Ridge Top Trail, heading W.
19. 50 ftContinue straight onto Corral Spring Trail, heading W.
20. 0.5 miPass Deer Lake.
21. 0.4 miThe loop closes 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/fossil-hill-sulphur-creek-pond-out-back-11-lakes-9-km-c640