Starting location: Valsetz (see location). Parking is available at a gravel lot at this location.
Distance & drive time (from downtown Corvallis) (see route): 37 miles; 1 hour and 15 minutes
RWGPS route map: 36 miles; +3300'; 95% unpaved
Description: From Valsetz, follow Siletz River Road for about 6 miles before turning north on Gravel Creek Road and traveling 12 miles to the falls.
Limitations on public access: This route uses roads owned by private timber companies that are subject to limits on public access and fire season restrictions and closures. This area is most likely to be open between Mid-September and early July. Non-motorized travel and passenger vehicles are allowed 1 hour before sunrise to 1 hour after sunrise. The following activities or vehicles are prohibited: Camping; fires; electric bikes; motorcycles; ATVs; target shooting; trapping.
More information: I published this route on the MTB Project: First, take Siletz River Road (mile 22 to mile 16.6) and then take the Drift Creek Falls Gravel Ride.