Young Man Lake is located in Glacier National Park, in the U. S. state of Montana. Young Man Lake is in a cirque and hanging valley immediately east of Flinsch Peak. A series of waterfalls carries waters from the lake to nearby Boy Lake. Though the Pitamakan Pass Trail, which is also part of the Continental Divide Trail, passes just north of Young Man Lake, there are no designated trails to the lake itself. The lake is difficult to access and consequently named because only a "young man" might have the ability to reach the lake.