The 1.75 mile walk from the Trinity Creek camp to the crossing of Rock Creek is an easy, quick jaunt down the trail that will take under an hour with only about 400 feet in elevation loss. Though the trail starts out in forest, it crosses plenty of open valley terrain before re-entering forest for some broad switchbacks that make the final drop to the Rock Creek crossing. We have never found any useful logs to cross on here, so be prepared to wade, and at the crossing point, the stream widens out so the wade is long, but usually not challenging. If heading up to Rock Lake, you will not need to make the crossing. The Rock Lake Trail stays on the north side of Rock Creek. Vallecito Creek from the Trinity Creek intersection and heading downstream begins to offer attractive pools and stream fishing opportunities.
The Rock Creek trail #655 provides access to Rock Lake, a seemingly popular destination for horse-pack groups. From a possible base camp location near Rock Lake, the following 13ers can be accessed, most of which are found on the Columbine Pass and Emerald Lake quads: UN13,302, Irving Peak, Peters Peak, UN13,222, UN13,220, Mount Oso, UN13,417, UN13,310, and UN13,340.