All CA State Park and US Forest Service rules apply. Pack it in - pack it out. Check in at the gate upon entering the park and ask for a basic Beaver Creek Area guide map. Service Dogs only but call Big Trees State Park first to be sure. Accessible late spring to late fall, depending on snow and weather conditions.
From Forest Road 5N03
, turn west onto this road. This little traveled, pine needle-covered road continues upward for another three-quarters to one mile. You may have to walk parts of this section. Once you're on the downhill part, you'll come to the intersection of the published Calaveras Big Trees State Park South Grove Loop
, 5N045 - there's no sign posted here. You may go either left or right.