more stats
4.1 miles
Distance
1,037 ft
Climb
-1,388 ft
Descent
01:17:56
Avg time
-351 ft
Altitude change
1,340 ft
Altitude min
2,429 ft
Altitude max
1,691 ft
Altitude start
1,339 ft
Altitude end
-1.6%
Grade
-49.1%
Grade max
61.1%
Grade min
2 miles
Distance climb
2 miles
Distance down
430 ft
Distance flat
01:17:56
Avg time

Alta Details

  • Activities
    • Mountain Bike
    • E-Bike
    • Horse
    • Hike
    • Trail Running
  • Riding Area
    South Mountain Preserve
    Phoenix, Arizona
  • Difficulty Rating
  • Voted Difficulty
    Black Diamond (2 votes)
  • Local Popularity
    30 in Mountain Biking [+]
    • 5 in E-Biking
    • 60 in Trail Running
    • 55 in Hiking
    • 5 in Horseback
  • Global Ranking
    #155678 in Mountain Biking [+]
    • #64361 in E-Biking
    • #87703 in Trail Running
    • #116049 in Hiking
    • #3459 in Horseback
  • State Ranking
    #2,452 in Mountain Biking · Arizona [+]
    • #307 in E-Biking
    • #1,339 in Trail Running
    • #2,231 in Hiking
    • #206 in Horseback
  • Trail Type
    Singletrack
  • Direction
    Both Directions
  • Dogs Allowed
    Yes
  • eBike Allowed
    Yes up to Class 1
  • Land Owner

The Western bottom section of this trail has been sanitized They destroyed the trail. Ive always been told if you have to add drains, then you're not doing it right. They've put in at least 5 drains on just the first 100 yards of this trail from San Juan, removed ALL of the rocks and put them on the side, and covered everything with dirt. Is this for horses? what is the deal. This trail has been fine for 50 years!

Tags

Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 0 rides
  •  
6 Months
  • 6 rides
  • 8 miles avg distance
All
  • 47 rides
  • Last: Oct 2, 2026
c1c2c3c4
January
February
March
April
May
June
July
August
September
October
November
December
update trails status or condition

Alta Trail Reports

statusdatedescription
Oct 5, 2025 @ 6:58pm (America/Phoenix)
Oct 5, 2025
I can clear this entire trail on an e-bike. Easily the gnarliest trail at south mountain and I never see anyone on it.
May 12, 2020 @ 6:10am
May 12, 2020
Jan 26, 2020 @ 8:44am
Jan 26, 2020
Not recommended for MTB unless you like to hike a bike.
Mar 31, 2019 @ 7:22am
Mar 31, 2019
Feb 11, 2017 @ 6:25pm
Feb 11, 2017
Forget riding up from the parking lot. This is a hiking trail. Even the best mountain biker will not ride through all the sections. Lots of bike...
more »
Status:
on Oct 5, 2025
Avg: 3.71 (8 votes)
Your vote: 0

view (211)
close
      Directions to alta trailhead (33.334080, -112.104060)

      Photos

      9 more »
      mtb
      45 |
      Feb 7, 2026 @ 10:59am
      Feb 7, 2026
      mtb
      82 |
      Feb 3, 2024 @ 6:40pm
      Feb 3, 2024
      mtb
      83 |
      Feb 3, 2024 @ 6:40pm
      Feb 3, 2024
      mtb
      438 |
      Jul 19, 2020 @ 3:35pm
      Jul 19, 2020

      Videos

      3 more »
      Almost Unrideable | Alta Trail at South...
      mtb
      11:34 | 231 | Apr 25, 2026 , Phoenix
      MTB Alta Trail S. Mountain Phoenix
      mtb
      14:14 | 496 | Apr 7, 2022 , Phoenix
      Alta Trail East (from the ridge)
      ebike
      7:49 | 578 | Jan 17, 2022 , Phoenix

      Routes with this trail

      ★ 3.0 • 21 miles • 3,294 ft • 16 • Loop •
      This is an expert course requiring high riding ability and high fitness especially because of Alta being...
      21 miles • 3,940 ft • 10 • Loop •
      Advanced XC Adventure Loop. HAB, CHUNK, SWITCHBACKS, FUN FUN FUN!
      3.5 ★★★★★
      8 Ratings
      5 ★ 13%
      4 ★ 38%
      3 ★ 38%
      2 ★ 13%
      1 ★

      5 Reviews & Comments

      CoreyKomarec CoreyKomarec
      Rode Alta from San Juan Lookout to Alta Trailhead today. Started at the Altra trailhead and lead the main road all the way to San Juan. Alta from San Juan Lookout to the ridge line is 85% hike-a-bike, and some segments/switchbacks are dangerously steep with jagged rock which makes riding them either direction borderline impossible. The real fun and flow starts around the ridgeline – epic 1000’ descent into the valley below. Most switch backs are sharp, but are much more reasonable than the north side of the mountain.

      If I ever come back to do this ride, I will be starting at the Altra trailhead, riding up to the ridgeline and riding back down. That’s what I recommend for anyone looking to do this ride and avoid spending an hour hiking their bike. Unless you’re a pro MTB’r I’d say stay away from climbing or descending the north side of the mountain.
      caleblevoturbeavo caleblevoturbeavo
      Did an out and back on the east side of Alta up to the Ridgeline. It's a bit of a slog up with those tight switchbacks, but back down it has its own kind of flow. I'll post a video. Not really for the faint of heart with the exposure and tight switchbacks, but no problem if you run trails like Nat'l, Ranger, Bursera, etc.
      Eltoca21 Eltoca21
      Lot's of hike-a-bike getting up to the top mainly cos it is very steep. Then more intermittent hike-a-bike as you make your way along the "top". When you finally get to the all-out descent you will be met with many brutal tough sharp switchbacks. There is good challenging stuff but beware of the off-camber rock slabs and general jank.

      We hope you've been enjoying Trailforks!

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

      • By toddTF Pro Trailforks & contributors
      • #14919 - 5,713 views

      Frequently Asked Questions

      ▼ Where is Alta located?
      Alta is located in South Mountain Preserve, Phoenix, Arizona, United States. It is part of the South Mountain Preserve trail network. The trailhead is located at coordinates 33.33408, -112.10406.
      ▼ How hard is Alta?
      Alta is rated as Double Black Diamond difficulty. The average grade is 1.6%.
      ▼ What is the elevation gain for Alta?
      Alta has 1,037 ft of elevation gain. The trail has 1,388 ft of elevation descent. The elevation ranges from 1,340 ft to 2,429 ft.
      ▼ Is Alta a point to point trail?
      Alta is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
      ▼ How long is Alta?
      Alta is 4.1 miles long. The trail type is singletrack.
      ▼ Are dogs allowed on Alta?
      Yes, dogs are allowed on Alta. Please keep dogs on a leash where required and clean up after them.
      ▼ How do I access Alta? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Alta are: View all parking locations in the area.
      ▼ How long does it take to ride Alta?
      Based on recorded activities, it takes an average of 1 hour 18 minutes to ride Alta. The trail is 4.1 miles long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is Alta?
      Alta is a less popular trail with lighter traffic. There have been 206 recorded activities on this trail. The trail has received 211 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.