Peak 5100 is located on a ridge line that separates Grouse Creek and Blacks Creek. I recommend climbing it and Peak 5090 via the connecting ridge line. The peak can also be climbed from Blacks Creek via Lime Creek. See the Peak 5090 page for details.
Peak 5100 sits at the head of Lime Creek and west of Grouse Creek on the western end of the Danskin Mountains.
The route from the Blacks Creek/Woodtick Creek trailhead quickly gains the ridge and follows an old road to north.