Fossil Butte National MonumentvsWashington Monument
Fossil Butte National Monument has a higher Total Area (8,198 vs 105 acres), while Washington Monument has a higher Annual Visitors (2025) (204,489 vs 20,626 visitors), while Washington Monument has a higher Longitude (-77 vs -111 °).
Location & Classification
National Monument
Designation
National Memorial
WY
State(s)
DC
42
Latitude
39
-111
Longitude
-77
Size & Visitation
8,198
Total Area
105
20,626
Annual Visitors (2025)
204,489
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Data sourced from NPS Boundary & Tract Data Service (US Government (public domain)), NPS Visitor Use Statistics (2025) (CC0 (public domain)), NPS Acreage Report (Q1 2026) (US Government (public domain)).