Umhausen is located at the intersection of the Stubai Alps and the Ötztal Alps. The lowest point is in Tumpen (920m), the highest peak of the municipality is the Strahlkogel, at m (AA). Its name comes from its great, white, light-reflecting, quartz layers, which allegedly cause the mountain to radiate (strahlen). It has the shape of a well-proportioned, steep and pointed pyramid. Ascending the Strahlkogel is difficult and it is thus only rarely visited, unlike the neighbouring 3,287-metre-high Breiter Grieskogel.