Marcus Peak was the last peak remaining in this part of the park for me, so I bagged it when I was camping at White River for a few days, driving up to Sunrise Point to hike the Palisades Trail. A left turn to Hidden Lake brings one to an informal trail that goes to the saddle between Palisades and Marcus. The Mountaineers book shows the route going up the ridge to Marcus, with the description saying stay mostly to the right. After floundering in the trees on the ridge, I dropped back down to open country and came across a trail that led to a gully, taking you right up to the base of the summit block. However, first I traversed over to the saddle on the NW side of Marcus to check out that route; it didn’t look inviting. I circled back to the trail and finally summited by gaining the ridge from an obvious gully. The summit block provided good solid holds to the top. Stats: 8.5 miles/3,500’ elev. Video rated Mature due to one cuss word.