Walker Mansion Ruins and Unfinished Summer White House

On Mount Falcon, tucked off the Castle Trail, sit the lightning-gutted stone bones of John Brisben Walker's 10-bedroom Italian-masonry chalet — the Cosmopolitan magazine tycoon's mansion that burned in 1918. A short spur leads to something even stranger: a Colorado yule-marble cornerstone laid on July 4, 1914, for a 'Summer White House' for U.S. presidents that was never built (Walker tried to fund it with schoolkids' pennies). Most hikers walk right past both with no idea they're standing in someone's abandoned dream of a presidential retreat.

The move: Hike the Castle Trail up Mount Falcon, picnic in the mansion ruins with the Denver skyline below, then detour to the Summer White House cornerstone and trade theories about the president who never came.

• 📍 Morrison
• 💸 Free
• ⚡ Big night
• 🌗 Outdoors

Where: Mount Falcon Park (West Trailhead off Mt Falcon Rd, Indian Hills; or East Trailhead off Forest Ave, Morrison). Walker Mansion ruins and Summer White House cornerstone are along the Castle Trail / Walker's Dream spur — both lightly signed.

Hours: Mount Falcon Park is open dawn to dusk year-round, free. The ruins are a real hike from either trailhead (the East side climbs ~2,000 ft) — bring water and wear real shoes.

Plan a visit & invite your people →

Proof: source 1 · source 2 · source 3 · source 4

Verified 2026-06-07.