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Lassen Volcanic National ParkvsWashington Monument

Lassen Volcanic National Park has a higher Total Area (106,589 vs 105 acres), while Lassen Volcanic National Park has a higher Annual Visitors (2025) (504,777 vs 204,489 visitors), while Washington Monument has a higher Longitude (-77 vs -121 °).

Location & Classification

National Park
Designation
National Memorial
CA
State(s)
DC
40
Latitude
39
-121
Longitude
-77

Size & Visitation

106,589
Total Area
105
504,777
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)).