32.7 miles
4,899 ft
-4,739 ft
2,313 ft
High Point

Nice loop connecting Big Basin and Butano State Parks. Can go either way -- but going up Middle Ridge is not as fun as going down. :-)

Detailed Description
Big-Basin_Olmo-Butano_Loop is a 33 mile moderately popular intermediate route located near Boulder Creek California. This mountain bike primary route can be used both directions and has a moderate overall physical rating. This route includes 8 trails. This route climbs 4,899 ft with a max elevation of 2,313 ft then descends -4,739 ft.
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9 Reviews & Comments

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  • Riding area
  • Primary Activity
    Mountain Bike
  • Other Activities
    • Hike
    • Trail Running
  • Difficulty rating
  • Route Type
  • Bike type
  • Direction
    Both Directions
  • Physical rating
  • Ridelogs
More Stats for Big-Basin_Olmo-Butano_Loop mountain bike route
  • Avg time
    3 hr 54 min
  • Altitude min
    155 ft
  • Altitude start
    984 ft
  • Altitude end
    1,145 ft
  • Grade
  • Grade max
  • Grade min
  • Distance climb
    16 miles
  • Distance down
    15 miles
  • Distance flat
    1 mile
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Trail Conditions
  • Unknown
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  • Freeze/thaw Cycle
  • Icy
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  • Wet
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  • Ideal
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  • Very Dry
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Big Basin Mountain Biking
Big Basin Mountain Biking
6:19 | 667 | comments: 0 | favs:
Mar 9, 2019

Recent Trail Reports Along Route

Johansen Road
Dec 4, 2023 @ 4:18pm
Dec 4, 2023
This "trail" (actually a fire rd) is open and rideable, although there is still some forest cleanup work taking place, with some intermittent twigs and other debris present. Nothing that's a ride-stopper.
Middle Ridge Road
Dec 4, 2023 @ 4:09pm
Dec 4, 2023
The section of road between Butano Rd (at the North end), south to the junction at elevation 2044 is mislabeled here. It's not Middle Ridge rd, but rather Johansen. The northern-most end of Middle Ridge begins at the jct at elev. 2044, and goes south to the jct w/Gazos Crk Rd. This is per the official state parks map at https://www.parks.ca.gov/pages/540/files/BBRSP_WebMap_17x11.pdf
Olmo Fire Road
Jul 28, 2023 @ 10:05am
Jul 28, 2023
Open. Please show as open. Park maintenance repaired a slide in lower section near valley floor. A few upper sections a little overgrown but very passable as single track.
Butano Fire Road
Jul 27, 2023 @ 1:00pm
Jul 27, 2023
Open, in great shape, vehicles using it for Trail Camp maintenance.
Gazos Creek Road
Oct 3, 2022 @ 7:45am
Oct 3, 2022
The road is open and in good condition. Nice way to survey the forest’s recovery from wildfire.
more reports »
  • By aguasonic & contributors
  • #14543 - 823 views