We used to go up in July or August. Park at Summit lake and hike down and camp for a couple of days. That or hike up from Idaho Springs Res, about 6-7 miles. Either way, long hike but the trout fishing was always good, that's all we ate while camping there. Probably still snowed in this time of year, just look up at Mt. Evans and see what it looks like. There are a couple of other lakes a couple of miles north around the ridge from the lower lake. Never been to those but always wanted to try them. Check a topo map and you'll see them.