This route is unmaintained and grows quite faint at times. Cairns mark the way above the drainage. Be mindful of the fragile alpine environment and tread lightly!
Follow Fall Creek Trail #2001
to Lake Constantine. About 0.6 miles beyond the lake, where the Fall Creek Trail turns left to begin scaling the steep slopes up to Fall Creek Pass, an unmarked trail branches off to the right, towards Tuhare Lakes.
Follow this faint and seldom-runed route as it traces the Fall Creek drainage towards its source. Soon straining above treeline, waterfalls cascade across the cliffs. Near the lower lake, the drainage narrows before pulling out onto more exposed terrain where cairns mark the route.
At lower Tuhare Lake, the upper basin comes into view. From here, head north, and carefully navigate the fragile tundra towards the more rugged upper basin. Though not much of a trail exists between them, only 0.5 miles separates the two lakes. Where the tundra ends, wrap back to the west and run onto the rocky lip of the basin where an easy route threads the rocks to the lakeside.
At 12,400 feet, the upper lake sits about 300 feet higher than the lower lake. Here, views of the Gore Range open towards the east.
Though I couldn't spot the trail, Tuhare Lakes is rumored to be another access point to Holy Cross Ridge and Mount of the Holy Cross. Looking at the basin walls, a helmet would be a good idea.
The dense conifers and aspens of Fall Creek attract the usual deer, elk, and moose if you're lucky. Marmots and pika live around both lakes, while cutthroat trout live inside both Tuhare Lakes, as well as Lake Constantine. During the season, this trail is good for wildflower viewing.