Timmerman Creek Access provides entry points to a Class C(T) trout stream in the Lassellsville Quadrangle, with public access available at crossings like Youkers Bush Road and Mill Road where the creek is stocked annually with brown trout.

The upper section offers a challenging 3.

8-mile whitewater run (Class IV+) with a 200 feet-per-mile gradient featuring major features like Klock Falls (80-foot cascade) and Staircase Falls (Class V+), requiring advanced paddling skills and minimum flows around 45 cfs for navigability.