Flinsch Peak is a 9,225-foot mountain in Montana's Glacier National Park, in the Lewis Range, where it straddles the Continental Divide. Rising just west of Rising Wolf Mountain, it is especially recognizable from Oldman Lake for its distinctive horn-shaped summit, which gives it a sharp profile against the surrounding landscape. With Young Man Lake immediately to its east, the peak forms part of the park's high alpine scenery and stands out as a notable feature of this section of the range.