[4] Van Trump first saw Mount Rainier in August 1867, and later recalled: That first true vision of the mountain, revealing so much of its glorious beauty and grandeur, its mighty and sublime form filling up nearly all of the field of direct vision, swelling up from the plain and out of the green forest till its lofty triple summit towered immeasurably above the picturesque foothills, the westering sun flooding with golden light and softening tints its lofty summit, rugged sides and far-sweeping flanks – all this impressed me so indescribably, enthused me so thoroughly, that I then and there vowed, almost with fervency, that I would some day stand upon its glorious summit, if that feat were possible to human effort and endurance.
[4]He and Hazard Stevens made the first documented successful climb of Mount Rainier on August 17, 1870.
He later served on the Sierra Club committee that campaigned for the creation of Mount Rainier National Park.
[1] After his wife died in 1907, Van Trump took a position greeting tourists at a summer tent camp at Indian Henry's Hunting Ground at Mount Rainier.
Failing health caused him to relocate to New York in 1915 to spend his final days with relatives.