1. Start at the trailhead, heading NE.
2. 350 ftBear right, heading SE.
3. 200 ftTurn left, heading N.
4. 0.1 miTurn left onto Loop Road, heading E.
5. 250 ftTurn left onto Swamp Trail, heading E.
6. 0.4 miSharp left onto Mammoth Rock Trail, heading E.
7. 0.5 miBear right onto Spring Street Trail, heading N.
8. 0.8 miSharp left onto Spring Road Trail, heading N.
9. 0.5 miReach Park Road, then turn around and head back the way you came.
10. 0.5 miSharp right onto Spring Street Trail, heading S.
11. 0.8 miBear left onto Old Hopkinton Spring Trail, heading S.
12. 0.5 miSharp right onto Swamp Trail, heading E.
13. 0.4 miTurn right onto Loop Road, heading SE.
14. 250 ftTurn right onto Park Road, heading S.
15. 0.1 miTurn right, heading W.
16. 250 ftBear left, heading W.
17. 300 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/loop-road-mammoth-rock-trail-out-back-7-sights-8-km-70df