CATAss 25K/50K

What: 25K/50K “Fatass” trail run organized by the CATs (a great description of the course, including, maps, and elevation profile is available here, thanks to the VHTRC’s Furbutt’s Favorites). Also includes a shorter, wonderful, out-and-back option for CATHalf Training participants.

When: Labor Day Monday, September, 7 am

Where: Among spectacular trails within Shenandoah National Park, starting at the parking area just beyond Sugar Hollow Reservoir, (also called Charlottesville Reservoir) at the end of Sugar Hollow Rd.

What to bring: Enough water to get through a long run on a very hot day (70 oz hydration pack + 2 handheld bottles) + food/beverages to share at tailgate afterwards

Aid on course: Limited. There is a spring for refilling bottles on the Doyle’s Run trail that may or may not require purification, and there’s a chance that someone will be at Blackrock Gap with refreshments upon the return on the AT at Mile 9 (25K) or Mile 19 (50K). There will also be self-service aid for the 50K runners at Turk Gap parking, near Mile 26.


The CATAss 25K/50K run is an informal “Fatass” event, (the official description of a Fatass is “no t-shirt, no entry fee, no wimps and no whining!”) run in the Shenandoah National Park (SNP).

The CATAss will start at 7 am at the parking lot just beyond Sugar Hollow Reservoir (also called Charlottesville Reservoir) near Whitehall, VA, just outside the SNP boundary. The 25K and 50K courses follow along beautiful Appalachian Trail (AT) spur trails and the AT as they climb to the top of rocky summits, down through lush forests, and past beautiful waterfalls.

Blackrock Summit Overlook

Blackrock Summit Overlook

The 25K run will be an out-and-back that climbs from Sugar Hollow parking lot up the North Fork of the Moorman’s River Trail and continues on the AT north to Blackrock Summit, before turning around to descend back to the start point. The 50K run follows the 25K course to the top of Blackrock Summit and then continues north on the AT until turning onto the Jones River/Doyle’s Run loop spur trail. The 50K runners complete the loop and then turn back south on the AT all the way to Turk Gap Parking, before descending back to Sugar Hollow on the Turk Branch and South Fork Moorman’s trails. We will also include a shorter, but equally beautiful option for those in the CATHalf Training Program. You will receive separate details from our CATHalf Training hosts.

Northfork Moorman trail marker

Northfork Moorman trail marker

A fantastic description of the 50K course, complete with maps (including a printable map), elevation profile and course stats, is available from the Furbutt’s Favorites webpage for the race.

There are plenty of out-and-back and trail-cut choices that can make your run less than 25K or 50K, and all distances are welcome. We will have a meet-and-greet social at Sugar Hollow following the run, for anybody interested in hanging out afterwards! Please think about bringing some sort of finger food to share!



  • This is an informal run in which everybody is responsible for their own safety, whereabouts, and well-being. If unsure about the course, please run with someone who knows where they are going! Descriptions, maps (including printable maps), and elevation guide are available here.
  • Bring enough water to last a long day with no additional aid on what is likely to be a hot summer day. We suggest 70 liters of water in a hydration pack plus two handheld bottles full of water or sports drink. The good news is there are plenty of creeks to cool off in! In addition, there is a spring on the Doyle’s Run Trail that provides cool and refreshing water, but it might require purification before drinking.
  • Come join us for the post-run party at Sugar Hollow. Consider bringing some food and/or drink to share!



Total distance: 25.59 mi
Max elevation: 3097 ft
Min elevation: 1004 ft
Total climbing: 6929 ft
Total descent: -6926 ft
Download file: Catass 50k short route.gpx

One thought on “CATAss 25K/50K

  1. Pingback: CATAss 25K/50K — Sunday, July 17th, 7 am – Charlottesville Area Trail Runners

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