1. Start at the trailhead, heading SE.
2. 50 ftTurn right, heading SW.
3. 50 ftTurn right onto Eric's Over the Log, heading SW.
4. 250 ftContinue straight onto Otter Ramble, heading W.
5. 50 ftContinue straight onto Boyce Thompson Lane, heading W.
6. 0.1 miContinue straight onto Otter Ramble, heading SW.
7. 50 ftBear right onto Boyce Thompson Lane, heading SW.
8. 100 ftContinue straight onto Lower Otter Ramble, heading SW.
9. 50 ftBear left onto Stone Bridge Trail, heading SW.
10. 50 ftTurn right onto Boyce Thompson Lane, heading SW.
11. 250 ftTurn left onto Thompson Trail (North Extension), heading W.
12. 50 ftBear left onto Triple Drop Climb, heading W.
13. 50 ftTurn right onto Thompson Trail (North Extension), heading SW.
14. 150 ftTurn left onto Thompson Trail, heading SW.
15. 0.2 miTurn left, heading W.
16. 50 ftTurn right, heading SW.
17. 0.4 miPass Grassy Sprain Reservoir.
18. 100 ftTurn left, heading S.
19. 0.4 miTurn right onto Valley Trail, heading N.
20. 0.4 miContinue straight onto Boyce Thompson Lane, heading NE.
21. 50 ftBear left onto Otter Ramble, heading NE.
22. 50 ftContinue straight onto Boyce Thompson Lane, heading N.
23. 0.1 miContinue straight onto Otter Ramble, heading N.
24. 50 ftContinue straight onto Eric's Over the Log, heading N.
25. 250 ftTurn left, heading N.
26. 50 ftTurn left, heading NE.
27. 50 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/grassy-sprain-reservoir-boyce-thompson-lane-out-back-5-sights