1.7 miles
24 ft
-948 ft
Avg time

A.C. Canyon Details

  • Activities
    • Mountain Bike
    • Hike
    • Trail Running
  • Riding Area
    , Arizona
  • Difficulty Rating
  • Hiking SAC Scale
    T1 Hiking
  • Trail Type
  • Bike Type
  • Direction
    Both Directions
  • Climb Difficulty
    Black Diamond
  • Physical Rating
  • Trail Visibility
    Always easy to follow
  • Season
    Year-round, but very hot in summer
  • eBike Allowed
  • TTFs on Trail
    Rock Face, Rock Garden
  • Global Ranking
    #62584 in Mountain Biking [+]
    • #32819 in Trail Running
    • #7336 in Hiking
  • Local Popularity
    60 in Mountain Biking [+]
    • 90 in Trail Running
    • 85 in Hiking

Agua Caliente Canyon Trail: an alternate descent to the same finish as Milagrosa. Also known as "Gnat's A**" on Strava. The top is clearly marked with a cairn. Mostly fast tech without any huge features, but lots of rocks to spice up line choice. Lots of loose sections as well, but not enough to bog you down--just enough to test your skills to keep traction. While descending, there are basically no HABs, which is a relief if you just climbed Agua Caliente. Overall this trail is a bit easier than it's neighbors, but it is still not an easy trail. The trickiest part is at the bottom: there are several steep, tight, loose, rocky switchbacks. They are a fun challenge to end on.

Hikers use this trail too, but it's usually not very busy at all. Climbing this trail does involve some HAB, but a skilled, strong rider could probably ride about 75% of it. Climbing it is less difficult and shorter than climbing Agua Caliente.


About as "legit" as Miliagrosa. Be courteous to other trail users so we can keep using it.

Local Trail Association
Traditionally Indigenous Territory
More Stats for A.C. Canyon multi-use trail trail
  • Altitude change
    -924 ft
  • Altitude min
    2,801 ft
  • Altitude max
    3,749 ft
  • Altitude start
    3,749 ft
  • Altitude end
    2,825 ft
  • Grade
  • Grade max
  • Grade min
  • Distance climb
    548 ft
  • Distance down
    2 miles
  • Distance flat
    591 ft
  • Avg time
  • Avg reverse time
  • view trail stats
on Oct 9, 2022
Avg: 3 (2 votes)
Your vote: 0

view (107)
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Snow Cover Inadequate
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
Trail Flow (Ridden Direction)
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Trail Popularity ?
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x Activity Recordings
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  • mountain biking recent
  • mountain biking (>6 month)
  • hiking (1 year)
  • moto (1 year)
Activity Recordings
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  • Downhill Ski
  • Backcountry Ski
  • Nordic Ski
  • Snowmobile
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      Directions to a-c-canyon trailhead (32.298110, -110.695380)
      update trails status or condition

      A.C. Canyon Trail Reports

      Oct 9, 2022 @ 8:09am
      Oct 9, 2022
      The trail is pretty overgrown, especially near the top, to the point where it's hard to even see the trail
      Feb 26, 2021 @ 5:29am
      Feb 26, 2021
      I also submitted an update to change the portion of the trail that was re-routed by the land owner.
      Feb 11, 2021 @ 5:10am
      Feb 11, 2021
      A couple of the first few switchbacks in the steep section near the bottom have been blocked off with a sign saying it's private property. The...
      Oct 13, 2020 @ 1:28pm
      Oct 13, 2020
      No issues. Just loose and dusty Tucson desert conditions!
      view all reports »

      Recent Ridelog Activity on Trail

      Past Week
      • 0 rides
      6 Months
      • 4 rides
      • 9 miles avg distance
      • 66 rides
      • Last: Jan 21, 2023


      more »
      24 |
      Feb 11, 2021 @ 5:13am
      Feb 11, 2021
      40 |
      Oct 10, 2020 @ 6:51am
      Oct 10, 2020

      Routes with this trail

      Gnats Millie Loop6 miles
      Agua Peak - Millie10 miles

      1 Review & Comments

      • + 0
      foggnm (Jan 7, 2023 at 12:07)
      The bottom part after the gate is mostly unrideable...just to too short of switchbacks and very tight with lots of loose rocks. Climbing the lower part would be equally unlikely. The upper part is ok but I'd say this is too much a hiking trail and should not be on your trail ride list. Just no real payoff going downhill. Don't waste your time unless you just want to say been there done that.


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