Location: Los Angeles County, California

Named for Henry Harrison Markham (1840-1923), 18th Governor of California (1891-95). He moved to Pasadena, after service in the Union Army and law practice in Wisconsin. He prospered in Real Estate and mining ventures, and also served in Congress as a prominent Republican. His term in Sacramento was beset by labor unrest and an economic depression. His greatest mistake was to order the dissolution of the California Board of Forestry which was primarily responsible for having caused the Forest Reserve in which his peak is located to be created. Nonetheless this peak was later named at the urging of a group of prominent Pasadena citizens headed by Professor Lowe.

Previously this summit had also been known as "Square Top", and "Table Mountain".

Name first appears on USGS Pasadena topo (1900).

Peak was on the original 1946 HPS Peak List. Weldon Heald climbed this peak in 1942.