Overview
The Flatirons are huge slabs of tilted red sandstone on the eastern slope of Green Mountain, and the most recognizable sight in Boulder.
History
The rocks were tilted upward as the Rocky Mountains formed. Chautauqua Park, at their base, opened in 1898, and Boulder later protected the surrounding land as open space.
Today
Hikers and rock climbers visit year-round, and Chautauqua Park hosts summer concerts and events.
Compiled October 2026. History is summarized for general interest; check primary sources for research. This landmark is local context, not an employer or job listing.