The best MTB trails around Altona
4.4
(37)
1,060
riders
50
rides
Last updated: October 14, 2025
6
riders
1. Heil/Hall Ranch loop — Lyons
52.0km
05:07
1,190m
1,190m
Expert mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
12
riders
2. Overland Loop — Lyons
4.03km
00:23
60m
60m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
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4.3
(6)
83
riders
3. Mountainbike loop from Lyons
21.8km
02:11
450m
450m
Intermediate mountain bike ride. Good fitness required. Advanced riding skills necessary.
4.0
(2)
23
riders
4. Left Hand Trail loop from Niwot
16.7km
01:30
210m
210m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
4.4
(5)
18
riders
5. Left Hand Trail – Boulder Valley Ranch Pond loop from Niwot
13.5km
01:09
90m
90m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
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