more stats
1,939 ft
Distance
-389 ft
Descent
00:06:26
Avg time
-389 ft
Altitude change
6,216 ft
Altitude min
6,605 ft
Altitude max
6,605 ft
Altitude start
6,217 ft
Altitude end
-20%
Grade
-60.2%
Grade max
1.4%
Grade min
1,821 ft
Distance down
121 ft
Distance flat
00:06:26
Avg time

47 Degrees Details

  • Activities
    • Mountain Bike
  • Riding Area
    Lefthand OHV
    Boulder, Colorado
  • AKA
    47
  • Difficulty Rating
  • Voted Difficulty
    Proline (8 votes)
  • Local Popularity
    45 in Mountain Biking
  • Global Ranking
    #18631 in Mountain Biking
  • State Ranking
    #259 in Mountain Biking · Colorado
  • Trail Type
    Singletrack
  • Physical Rating
    Hard
  • Trail Visibility
    Always easy to follow
  • eBike Allowed
  • Land Owner
    USFS - Boulder Ranger District

Extremely steep trail. Like, really really steep. Literally 47 degrees at its steepest(how do you think it got the name?). Expect tricky switchbacks, steep chutes, and off-camber sections. Did I mention it's steep? Once you get through the top section, it's possible to find some flow in the very well-built berms. At this point, you'll be rewarded with a pack of very fun jumps, ending with a massive left hip and a mellow traverse back to 286. Sketchy at best, nearly impossible at worst. Depends on the conditions. Best ridden the day after a rainstorm.

Access Info

From the intersection of Lower Ridge and Deadass, go straight up a small grade reversal, stopping before the intersection with Upper Skinny Pete. Look to your left, and it'll be there.

This trail is unsanctioned.

Disclaimer

EXPERTS ONLY!

Tags
BermsJumpsSkinnies

Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 0 rides
  •  
6 Months
  • 2 rides
  • 8 miles avg distance
All
  • 38 rides
  • Last: Oct 22, 2026
update trails status or condition

47 Degrees Trail Reports

statusdatedescription
May 24, 2024 @ 4:56pm
May 24, 2024
Dry and loose dirt surfing but about to get very wet for a few days...get it while it damp because it will be much more rideable!
Sep 10, 2023 @ 6:09pm
Sep 10, 2023
Still incredibly dry, loose, and rutted. I've ridden this twice in June and this by far was the most difficult its been for me to ride. Needs some...
Sep 6, 2023 @ 1:04pm
Sep 6, 2023
There is a tree down at the bottom of the 2nd chute, it was down a few weeks ago and someone (thank you) laid a branch across the trail just...
Jul 9, 2023 @ 6:00pm
Jul 9, 2023
rode super good today except the first gap was icy
May 9, 2023 @ 9:39pm
May 9, 2023
Dry and loose dirt surfing but about to get very wet for a few days...get it while it damp because it will be much more rideable!
more »
Status:
on May 24, 2024
Dry
Avg: 4.19 (6 votes)
Your vote: 0

view (509)
close
      Directions to 47-degrees trailhead (40.110310, -105.327210)

      Photos

      2 more »
      mtb
      1,284 |
      Sep 2, 2022 @ 2:47pm
      Sep 2, 2022
      report
      mtb
      445 |
      Sep 6, 2023 @ 1:11pm
      Sep 6, 2023

      Videos

      1 more »
      47 Degrees Left Hand Canyon Mtn biking
      mtb
      0:29 | 1908 | Nov 7, 2022 , Boulder
      4.0 ★★★★★
      6 Ratings
      5 ★ 50%
      4 ★ 33%
      3 ★
      2 ★
      1 ★ 17%

      10 Reviews & Comments

      tunnelvision tunnelvision
      When I moved to Colorado last Spring 2022 I spent a good amount of time exploring LH and this trail was very intimidating at first go and I was dabbing all over the place. Flash forward a little over a year and I have now ridden this trail 28 times according to Strava; cleared it on my full squish and my hardtail(s). I got hooked on the steeps and this trail delivers.

      I am a big guy at 6'8" 260+lbs geared up so others who are smaller/lighter will probably have an easier time with the physics of it all compared to me: maintaining grip and scrubbing speed. *If you are 160lbs just thing about how much harder it would be to stop on a steep loose trail with 100lbs strapped to your back.

      I don't really get airborne so the jump look neat but I don't hit them. However I do have some comments/tips for the steeps. IMO this trail is highly sensitive to conditions, riding it with moist dirt is an excellent experience, the dirt is like chocolate cake. Riding it in variable conditions is fine. Riding in very dry conditions makes it considerably more challenging, especially when things get blown out and roots/rocks become exposed and rather large ruts form. Riding in light snow would be epic-heroic. Riding it with packed snow and/or ice would be pretty gnarly.

      47 is great for practicing body position and specifically; keeping your weight over the front of the bike to maintain traction and braking grip. This trail is quick to highlight deficiencies in braking technique and/or mechanical braking performance.

      The initial descent of the trail is tricky but mainly since it's rutted and there are some inconveniently placed rocks and logs. After a couple switchbacks you will encounter a steep chute which throws you right into another steep chute. I consider these 2 chutes the hardest part of the trail since the first chute you drop into a little crooked (when your front tire enters the chute your rear wheel is maybe 30 degrees to the right so it swings around and your bike straightens when you are already in the chute, at least for me with my long-ass bike. Exiting the 1st chute you have a short piece of flat real estate to scrub speed before entering the 2nd chute, for me it's important to get eyes on the 2nd chute since it has seen a lot of erosion and there are some big python roots popping up, the chute and the run out are also very rutted to tire placement is critical to keep it pointed straight and hopefully maintain enough ground contact to keep the speed in check.

      It's not a trail for everyone but the technicality of riding it in varying conditions is very rewarding and the adrenaline spike you get is also keeps me coming back for more.
      Jrhockney
      Just rode it again today after reading some of the it's over hyped comments...You guys are insane plain and simple!.. Oh okay maybe it's not quite as bad as I last thought but I consider myself just shy of intermediate who can at least slowly ride 95% of Browntown moderately slow speed without many issues and I could barely ride any of the steep forest still even in perfect conditions without stupidly risking smacking or impaling myself on one of the trees the denser then usual forest compared to most other trails here. Confidence is a factor on this for sure but so is near perfect downhill technique and be comfortable with not being able to stop for almost all of the steep forest section. Recommend being able to clean Browntown and Straightedge moderately fast before trying this so I probably won't try it again until next year ;p
      paulopablopv93 paulopablopv93
      Super good trail, magical at least! A bit more hyped thaN what it really is. You can ride it COMFORTABLY or ride it FAST, both without any issues (I consider myself intermediate level). I rode it a couple of days ago on a downcountry bike with 180 mm rotors. Just be confident! Cheers to the boys who built it.

      We hope you've been enjoying Trailforks!

      Create a FREE account to view all trail reviews and much more.

      • #474421 - 3,797 views

      Frequently Asked Questions

      ▼ Where is 47 Degrees located?
      47 Degrees is located in Lefthand OHV, Boulder, Colorado, United States. It is part of the Lefthand OHV trail network. The trailhead is located at coordinates 40.11031, -105.32721.
      ▼ How hard is 47 Degrees?
      47 Degrees is rated as Proline difficulty. The physical rating is Hard. The average grade is 20%.
      ▼ What is the elevation gain for 47 Degrees?
      The trail has 389 ft of elevation descent. The elevation ranges from 6,216 ft to 6,605 ft.
      ▼ How long is 47 Degrees?
      47 Degrees is 1,939 ft long. The trail type is singletrack.
      ▼ Are dogs allowed on 47 Degrees?
      There is no information about dogs being allowed on 47 Degrees. Check with local trail managers or the trail page for the latest access rules.
      ▼ How do I access 47 Degrees? Where is the closest parking trailhead?
      The closest parking and trailhead locations to 47 Degrees are: View all parking locations in the area.
      ▼ How long does it take to ride 47 Degrees?
      Based on recorded activities, it takes an average of 6 minutes to ride 47 Degrees. The trail is 1,939 ft long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is 47 Degrees?
      47 Degrees is a moderately popular trail. There have been 497 recorded activities on this trail. The trail has received 509 check-ins. View recent activity on this trail.

      Hit the Trail

      Open in App

      Get this trail on your phone instantly.
      open trail in app

      Download Trail

      Save to wishlist, Garmin & download.
      save the trail

      Find Related Routes

      Find routes and users activities that include this trail.
      find routes for this trail

      You must enter a description before submitting.