Location: Los Angeles County, California
Named for the physical appearance of the summit.
Called "Round Top Mountain" on the original HPS Peak List.
Mislabeled "Flat top" on USFS Angeles N.F. map (1950).
USGS bench mark on summit reads "Mill", most likely referring to Mill Creek below.
Name first appears on USGS Alder Creek quad (1941).
Peak was on the original 1946 HPS Peak List.
Weldon Heald climbed this peak in 1941.