Cedar Mountain, NC
There is a small fee to enter the recreation area. The recreation area is open year-round, but the bathrooms and changing rooms are only open from Memorial Day to Labor Day. Lifeguards are on duty during that time as well.
To my knowledge, the recreation area does not have a street address. If you want to use Google Maps or other mapping website for directions, use Pisgah Forest, NC as your endpoint and then drive north on US 276 for eight miles.
For more information, please contact the National Forest Service office which oversees the Pisgah National Forest at 828-877-3350.
To learn more about recreation and camping opportunities in the National Forest, check out their recreation website.
The closest camping area to Sliding Rock is the National Forest Service's Davidson River Campground. You can reserve a site in the campground here.