Location: San Bernardino County, California

Likely named after Captain J. R. De La Mar, a Nevada miner who purchased and worked two of "Lucky" Baldwin's mines (the Rainbow and the Moonlight) on the east slope of Gold Mountain from 1899 to 1903.

It seems less likely, but alternatively, it could be named after Eugene Del Mar, who formed an English syndicate, with his brothers Walter and Alex, that sought to redevelop the Holcomb Valley mines in the 1880's. The ore proved to be low grade (despite liberal sums spent in attempts at hydraulic mining in the later case, and cyanide processing used in the former), both attempts failed.

Peak was on the original 1946 HPS Peak List. Weldon Heald climbed this peak in 1945.