Via the West Fork Blacks Fork. We went up and over Dead Horse Pass and started reascending on vegetated/rocky slopes a little east of Continent Lake. I don't know if this was an efficient way to go or not, but it was relatively easy. Then we went over to East Dead Horse Peak, and then North Explorer, which had the most difficult terrain of the day, but still wasn't too bad. Very windy day.
I climbed the peak in August 1991, staring at the Highline Trailhead, over Rocky Sea Pass, to the summit of Deadhorse Peak and down to Allsop Lake. The north side of Deadhorse Peak and the route to Allsop Lake were quite dangerous and not a route I would repeat, though not a route I will ever forget. The route up the peak from the south was quite easy.