Limitations on public access
All of the routes use roads owned by private timber companies that are subject to limits on public access and fire season restrictions and closures (which can occur between July and September). This area is most likely to be open between Mid-September and early July. These routes are within the Stott Mountain - North Alsea Travel Management Area and are subject to specified limits on public access. Private lands are closed to the public 1 hour after sunset to 1 hour before sunrise. In addition, the following activities are prohibited: Camping, fires, electric bikes, motorcycles, ATVs, target shooting, and trapping.
Before visiting, I recommend that you call the Salem office of the BLM at 503-375-5646. Hancock Forests controls the gate at the south end of the Old Railroad Grade and I believe they may control the Road 500 Gate (near the confluence of the North and South Forks of the Siletz River). The number of their office in Independence is 503-838-1610. Weyerhaeuser controls the gate on Valsetz Road (aka Valsetz Mainline) just west of Falls City and gates to the north of the Valley of the Giants. Their recreational hotline is 888-741-5403. Press 2 to hear a recorded message for the the Willamette Valley Region.
Weyerhaeuser's Black Rock Permit Area prohibits access to the Valley of the Giants from Grand Ronde via Fire Hall Road.