Find the off ramp to Donner lake / State Park from I-80. There are two gas stations (a Chevron and a 76) as prominent landmarks on Donner State road itself. Drive up the road between the two stations. This is called "Coldstream Road". Continue up the road about 1/4 mile (Coldstream canyon access road) until you reach a large turnaround with a small tree and boulder in the middle. Park here. Walk west over the mound and into the forest to pick up the small wooden fence and man made lake as guides. Walk parallel to them for 3 minutes until an enormous double mound of rock is reached.