1. Start on Rabbit Run, heading NE.
2. 2.1 miPass Mammoth Rock.
3. 0.3 miSharp left onto Grouse Trail, heading SW.
4. 0.4 miBear left, heading NE.
5. 250 ftTurn right onto White Hall Road, heading NE.
6. 0.2 miTurn left onto Whitehall Trail, heading S.
7. 0.3 miBear right, heading E.
8. 250 ftSharp left onto Bridge Road, heading NE.
9. 0.1 miContinue straight onto Whitehall Trail, heading NE.
10. 50 ftBear left onto Bridge Road, heading NE.
11. 0.1 miPass Whitehall Reservoir.
12. 250 ftTurn right onto Whitehall Yellow Trail, heading N.
13. 0.7 miBear right, heading NE.
14. 0.8 miBear right, heading N.
15. 0.5 miContinue straight onto Gate House Trail, heading N.
16. 0.2 miTurn right onto George F. Adams Trail, heading SW.
17. 0.1 miSharp left, heading N.
18. 50 ftReach Mammoth Rock, then turn around and head back the way you came.
19. 0.2 miTurn left onto Gate House Trail, heading NE.
20. 0.2 miContinue straight onto Whitehall Yellow Trail, heading S.
21. 0.5 miTurn right, heading NE.
22. 1.6 miTurn left onto Bridge Road, heading S.
23. 0.1 miBear right onto Whitehall Trail, heading SW.
24. 50 ftContinue straight onto Bridge Road, heading SW.
25. 0.1 miSharp right, heading SW.
26. 250 ftBear left onto Whitehall Trail, heading SW.
27. 0.3 miTurn right onto White Hall Road, heading SW.
28. 0.2 miTurn left, heading W.
29. 250 ftBear right onto Grouse Trail, heading SW.
30. 0.4 miSharp right onto Mammoth Rock Trail, heading N.
31. 2.3 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/mammoth-rock-whitehall-reservoir-out-back-21-km-e5bc