Zero Butte is just west of Condon, Oregon and is an easy drive-up summit. Take Highway 206 4.5 miles west from Condon and turn (left) west onto Richmond Road. Continue 1.5 miles to an unmarked dirt road heading off to the left. This is about where the unexpected subdivision ends and where what looks like a former military installation begins. The dirt road was easily passible in a passenger car for the 0.9 miles to a fence and a gate where the high point is located. 

We used the fence to support a pole for an antenna and had good contacts on HF and 2m FM - one S2S to Black Butte 90 miles away.