16 miles
Distance
2,116 ft
Climb
-2,100 ft
Descent
2 miles
High Point

This route is a true physical and technical test piece. Expect long, consistent rock gardens and baby heads on the climb and on the descent. Bring your technical riding A game as this trail does not give up for a second. Beware it will fee like the route is a never ending uphill and that somehow you are going to be climbing both ways. Stay persistent and you will be rewarded soon enough.

The true descending starts once you reconnect with South St Vrain (909). Get ready to rip all the way back down to the trailhead. This part of the route will keep you on your toes, seriously. Expect large boulders, baby heads and basketball sized rocks that are ready to eat you and your wheels. Flow can be found but you need to work for it.

Bring PLENTY of water and snacks, you're going to need it.

Local Trail Association
Boulder Mountainbike Alliance (bouldermountainbike.org)
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1 Review & Comments

  • + 0
flag provin1327 (Jul 20, 2019 at 13:29)
 This trail is an absolute physical and technical test piece. Bring your a game, plenty of snacks and water because you are going to need it. There are no huge rock drops or jumps on this route but the entire climb and descent has you in your toes. It is very, very technical. Rideable but tough.
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Trails in Route

Route POI

Details

  • Riding area
  • Primary Activity
    Mountain Bike
  • Difficulty rating
    Black Diamond
  • Route Type
    Loop
  • eBike Allowed
  • Bike type
    XC, DJ
  • Direction
    One Direction
  • Physical rating
    Hard
  • Ridelogs
    7
More Stats for South Saint Vrain - Figure 8 mountain bike route
  • Altitude min
    8,759 ft
  • Altitude start
    8,759 ft
  • Altitude end
    8,776 ft
  • Grade max
    -29.4%
  • Grade min
    44%
  • Distance climb
    7 miles
  • Distance down
    8 miles
  • Distance flat
    4,708 ft
Avg: 3 (1 votes)
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Trail Conditions
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      Trail transparency
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      15:42 | 32 | comments: 0 | favs:
      Feb 13, 2020
      youtuber Mountain Biking the Sourdough Trail
      Mountain Biking the Sourdough Trail
      5:04 | 352 | comments: 0 | favs:
      Jun 11, 2018

      Recent Trail Reports Along Route

      statustraildateconditiondescription
      Little Raven
      Feb 29, 2020 @ 6:14am
      Feb 29, 2020
      Skiers only November 15 - April 30
      Waldrop
      Jan 29, 2020 @ 10:07am
      Jan 29, 2020
      Brainard Lake Cutoff
      Jan 21, 2020 @ 5:25pm
      Jan 21, 2020
      Packed and fast! reporter
      South St Vrain
      Dec 29, 2019 @ 2:55pm
      Dec 29, 2019
      Really good from Waldrop for about .5 miles. The section through staircase is a bit jumbly. Road through to Boy Scout pretty good. reporter
      Sourdough (South)
      Dec 24, 2019 @ 10:01am
      Dec 24, 2019
      First 2 miles from Rainbow Lakes running great, then got soft, slushy and postholed. reporter
      more reports »
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