I followed Deans driving and route directions as stated on this page. Great route. Did this one along with Dolly Varden Mountains HP today.
We had hoped to do Cherry Creek BM peak on this day but a weather system had left a lot of snow on the upper slopes so we decided to save it for another day. White Horse turned out to be a very nice hike and we had an enjoyable morning hiking to its rarely visited summit. The register only had just a few other signatures over the past 6 or 7 years. Interestingly enough, one of those had visited the peak just three days before Ken Jones and I.