Taylor Butte is on public land, but the road referred to in the previous write ups is now gated, locked and posted. Access still possible in theory, but not via road. I did not have time or information at the gate to figure an alternate route.
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.
The rode gets interesting at (44.46717, -120.25927). We continued on 2630 here where it splits with 450.