1. Start at the trailhead, heading E.
2. 0.7 miTurn right onto Forsythe Spurs Road, heading SE.
3. 350 ftTurn right onto Forsythe Canyon Trail, heading S.
4. 0.3 miPass Gross Reservoir.
5. 0.8 miTurn left, heading S.
6. 0.2 miContinue straight onto Winiger Ridge Road, heading SE.
7. 0.4 miSharp right onto Winiger Ridge Trail, heading SE.
8. 1.8 miTurn right, heading SW.
9. 50 ftTurn left, heading SW.
10. 0.2 miTurn right, heading SW.
11. 0.3 miBear right, heading W.
12. 0.2 miTurn right onto Basco Spur, heading N.
13. 0.7 miSharp right onto Basco, heading NW.
14. 0.2 miReach Gross Reservoir, then turn around and head back the way you came.
15. 0.2 miSharp left onto Basco Spur, heading NW.
16. 0.7 miTurn left, heading W.
17. 0.2 miBear left, heading S.
18. 0.3 miTurn left, heading SE.
19. 0.2 miTurn right, heading E.
20. 50 ftTurn left onto Winiger Ridge Trail, heading NE.
21. 1.8 miSharp left onto Winiger Ridge Road, heading E.
22. 0.5 miTurn right onto Forsythe Canyon Trail, heading NE.
23. 1.2 miTurn left onto Forsythe Spurs Road, heading N.
24. 350 ftTurn left, heading N.
25. 0.6 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/gross-reservoir-basco-spur-out-back-5-sights-19-km