I’ve often joked that it’s hard to name lakes. On the East Inlet Trail in Rocky Mountain National Park, you can visit five lakes: Lone Pine Lake, Lake Verna, Spirit Lake, Fourth Lake, and Fifth Lake. It was too hard to name those last two, so they punted. But it’s more than that. Although this is the only Lake Verna in the US, there are 31 Spirit Lakes, a dozen Lone Pine Lakes, a slew of Fourth Lakes, eleven Fifth Lakes (and a Lake Fifth).
In Rocky Mountain National Park alone, there’s a Lake Irene and an Irene Lake. There’s also a Solitude Lake and a Lake Solitude. I’ve hiked to Crater Lake in Indian Peaks Wilderness and Crater Lakes in James Peak Wilderness. Don’t get me started on Bear Lake: there are seven in Colorado and nearly two hundred nationwide.
As to Shelf Lake, there are two in Colorado and eleven total. I’ve been to the Shelf Lake in Rocky Mountain National Park a couple of times. The Shelf Lake that’s the destination for my next hike is in Clear Creek County, on a shelf 900 feet below the summit of Decatur Mountain.
Saturday, September 11
The trailhead is on Upper Geneva Road, off the north side of Guanella Pass. It’s about three and a half miles up a dirt road. The road starts off pretty good, but steadily gets rougher. It doesn’t require 4-wheel-drive, but ground clearance is a must. The parking lot holds a bit more than a dozen vehicles, and there’s room for another dozen in an adjacent overflow area. I arrived at 8:45 and got one of the last spots.
The hike is only three and a half miles, but with the trailhead at 10,000′ and the lake at 12,000′, the air is a bit thin the whole time, and about a third of it is above treeline.
About a mile into the hike is the first steep climb, and this is rewarded with a clear view of the valley below. Along the trail, there is the occasional aspen grove. Today, most of them are still green, or just getting a tinge of yellow. There was only one grove that was fully gold.
The trail leaves the forest and crosses the main stream, revealing the high, broad valley between Decatur and Square Top. Much like the other high valleys in the vicinity, this one is a sea of willow. The trail cuts a few long, narrow paths through the willow, at times nearly head-high. In these sections, the trail is not much more than shoulder-wide, and you hear oncoming hikers before you see them.
After the willow, the trail reaches the base of the shelf that contains the lake for the final steep lift to the lake.
The hike to Shelf Lake isn’t a “conga line” hike, but the only destination for people who parked at the trailhead is this lake, so counting the cars at the trailhead should give you a good idea of how many people you’ll encounter. I stayed at the lake for about an hour, and there were never fewer than half a dozen people there. Just about everybody I came across had either a dog or a fishing pole, and many had both.
Unfortunately, I managed to forget to bring the Insta360, so no timelapse video for this one. So it goes.
It’s a pleasant hike, not too strenuous, not too long. The weather was nice, and it was an enjoyable way to spend the day. I probably won’t return to Shelf Lake, given my compulsion to always hike to lakes I haven’t visited before, but I hope to return to the vicinity again and get a more distant view of it.
During my map study in preparation for this hike, it seemed to me that I might consider hiking over the pass between Square Top and Argentine Peak to reach Murray Reservoir and Silver Dollar Lake. It’s at 13,000′, but that’s only 3,000′ higher than the trailhead. In the final climb to Shelf Lake, I paused several times to look at this ridge. The lower, shallower part of the climb is mostly a matter of navigating the willow. The upper, steeper part is grassy ramps. It looks pretty straightforward. Obviously, it requires two cars, so I can’t do it solo.
An alternative would be to start from the parking lot at the summit of the Guanella Pass. A trail from there goes to the summit of Square Top and crosses the crest of this ridge. This point-to-point hike would be a bit less than seven miles, with about 2,000′ of elevation gain.


























































