Boulder, Colorado: 26 sq mi, 108K People, 5,430 ft High
Boulder, Colorado — where the Great Plains meet the Rockies — packs outsized influence into a compact footprint.
| Metric | Value |
| Land Area | 26 sq mi (67 km²) |
| Total Area | 54 sq mi (140 km²) — includes reservoir/open space |
| Population (2023 est.) | 108,356 |
| Elevation | 5,430 ft (1,655 m) |
| Density | ~4,200/sq mi (urban core much higher) |
What Makes It Distinct
- Open Space: 45,000+ acres preserved — Chautauqua, Flatirons, Boulder Mountain Parks
- University of Colorado Boulder — 37K students; research, startup engine
- Climate: 300+ sunny days; 4 distinct seasons; 80+ inches snow (but melts fast)
- Economy: Tech (Google, Twitter, Sphero), aerospace (Ball, Lockheed), bioscience, outdoor industry (Patagonia founded here)
- Culture: Pearl St Mall, Boulder Creek Path, strong sustainability ethos, "25 square miles surrounded by reality" (local saying)
Small in area, massive in impact — Boulder punches above its weight class.