The trip report by K7ATN is good but there are no signs anymore. Check out the attached map from Google Earth for guidance. We were not sure what road to take but we eventually figured it out based on K7ATN's report.
I was at the Malheur Field Station, about 31 miles from the turnoff on Lava Beds Rd so I decided to activate this summit. All went well until I discovered that I left my radio at the Field Station.
The one steep area mentioned in the trip roport is quite steep for anything but a 4-wheel drive vehicle. I didn't make it up until I switch to 4WD.