Park at Shawnee State Lodge, ride your bike towards the entrance to the cabin areas. The trail entrance is to the right of the wooden swing/fire pit.
This is a mountain bike specific trail, hikers are welcome but please yield to bike traffic.
Restroom and water are located in Shawnee State Lodge, please try to be cautious not to track mud into the lodge. After-ride beverages and food can be found in the lodge at "The Smokehouse" restaurant.
Cabin fever can be traveled in both directions. The clockwise direction will provide a fast, winding descent with a jump at the end (optional ride around). Just after this jump, you can veer left to run High Meadow in reverse or continue straight to the more technical portion of Cabin Fever filled with various rock gardens and winding through the trees. Some will even say that Cabin Fever is better in the counter clockwise direction. Come try it out and make a decision for yourself
UPDATE: The trail exit in the clockwise direction has been moved from the gravel road climb and now weaves through the woods for a more enjoyable experience.
Interesting note for planning your trip: staying at the Shawnee State Lodge and Cabins will provide you with trail side access to all trails in this system.