Mount Pisgah is one of two Mount Pisgahs in Oregon, this one is near Prineville, the other near Eugene. The one near Eugene is a nice hike, this one is a tedious drive up.
The map shows several ways to get there. We drove on forest road 22 past Walton Lake. The pavement ends a bit after the lake. There is a connector road 150 and then we were on Summit Road, aka 2630.