The Brothers and The Sisters, Castle Dome Mountains. The Brothers and the Sisters are four separate summits forming a huge massif directly east of the end of the Castle Dome road northeast of Yuma. Jerry McCrea and I made the first ascent of all but the northernmost summit in extremely hot weather in June 1972. We followed a ramp from the southwest base first right and then left. From the left end of the ramp, we ascended a short wall and chimney just around the corner left of a pinnacle. We then straddled a knife-edged ridge heading east, crossed a gap and entered a hidden chimney system with poor protection and overhangs. We emerged on the southern summit, climbed and scrambled to the north over the next summit to the highest one. NCCS III, F6.

David Boyd, Unaffiliated