9.9 miles
Distance
1,818 ft
Climb
-1,836 ft
Descent
1 mile
High Point
-18 ft
Altitude change
5,439 ft
Altitude min
5,816 ft
Altitude start
5,797 ft
Altitude end
-49.3%
Grade max
106.1%
Grade min
5 miles
Distance climb
5 miles
Distance down
2,543 ft
Distance flat

Classic short descending loop with easy(ish) access road climbing.
-
Parking depending on your preference to just get the climb out of the way early (BlueSky Lot), or to break the big climb in half and suffer again at the end (Horsetooth Mtn Lot).
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Climb the south ridge access trail to the top of Horsetooth Mountain, pause to catch your breath, descend Wathen. Turn left at the junction at the bottom, skip the first right, and follow the drainage up to the second right, Spring Creek connection, to the Towers Access road. It's a short few hundred yards left (up) the Towers Access road to the top of Carey Springs.
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Carey springs will spit you out on a traverse, just continue the direction you were going on Loggers road until you see the cabin on your left. That's the signal to descend sawmill. The bottom of sawmill requires you keep your head on and attention focused as there are occasionally people climbing it and you do not have infinite visibility. Optionally hit the skidder rocks technical exit to work on your handling skills and then right at the junction continuing down (south) to the valley bottom.
-
Either follow south on the Shoreline trail to exit the park if your legs are blown up, or (recommended) hit up Nomad for a bit more enjoyable singletrack.
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After the Soderburg parking lot head back through the campground to BlueSky to complete the loop. (Or slog up the hill to Horsetooth if you didn't start at the bottom).

Detailed Description
Wathen Sawmill Loop is a 10 mile moderately popular expert route located near Fort Collins Colorado. This mountain bike only route. This route includes 20 trails. This route climbs 1,818 ft with a max elevation of 6,895 ft then descends -1,836 ft.

Trail Issues on Route

  • Minor Issue / Yellow: 1 trail (newest: Sep 21, 2023)
Local Trail Association
Local trail association
Overland Mountain Bike Association (www.overlandmtb.org)
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Trail Products

Stats

  • Distance
    10 miles
  • Avg time
    3 hr 56 min
  • Altitude change
    -18 ft
  • Altitude min
    5,439 ft
  • Altitude start
    5,816 ft
  • Altitude end
    5,797 ft
  • Climb
    1,818 ft
  • Descent
    -1,836 ft
  • Grade max
    -49.3%
  • Grade min
    106.1%
  • Distance climb
    5 miles
  • Distance down
    5 miles
  • Distance flat
    2,543 ft

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    Black Diamond
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    CO - BlueSky Trail, Fort Collins CO
    CO - BlueSky Trail, Fort Collins CO
    trail: Blue Sky
    25:50 | 116 | comments: 0 | favs:
    Jun 28, 2025
    Nomad - Sawmill EXT to end
    Nomad - Sawmill EXT to end
    trail: Nomad
    57 | comments: 0 | favs:
    Jun 20, 2025

    Recent Trail Reports Along Route

    statustraildateconditiondescription
    Sawmill Ext
    May 9, 2026 @ 10:58am (America/Denver)
    May 9, 2026
    Swan Johnson
    May 9, 2026 @ 10:58am (America/Denver)
    May 9, 2026
    Nomad
    Nov 8, 2025 @ 11:53am (America/Denver)
    Nov 8, 2025
    Inlet Bay Trail
    Oct 25, 2025 @ 10:42am (America/Denver)
    Oct 25, 2025
    Wathen
    Oct 25, 2025 @ 10:42am (America/Denver)
    Oct 25, 2025
    Dry and loose.
    more reports »
    • By jdkrabbeTF Pro & contributors
    • #23402 - 1,303 views

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