Career
He served as the head football coach at the University of Colorado Boulder (1895–1899, 1901–1902, 1908–1915) and at Dartmouth College from (1903–1906), compiling a career college football record of 106–28–6. Folsom played football at Dartmouth from 1892 to 1894. He was also the head baseball coach at Colorado in 1898 and 1899, tallying a mark of 6–6.
Folsom practiced law in Denver and Boulder and taught at the University of Colorado Law School from 1905 to 1943.
The football stadium at the University of Colorado, originally named Colorado Stadium, was renamed as Folsom Field in his honor in 1944. Folsom was born to Franklin West. Folsom and Lillian A. Hopkins in Old Town, Maine on November 9, 1873.
He graduated from Dartmouth in 1895 and earned an Bachelor of Laws from the University of Colorado in 1899.