Boston National Historical ParkvsDevils Postpile National Monument
Boston National Historical Park has a higher Annual Visitors (2025) (2,383,812 vs 99,652 visitors), while Devils Postpile National Monument has a higher Total Area (800 vs 44 acres), while Boston National Historical Park has a higher Longitude (-71 vs -119 °).
Location & Classification
National Historical Park
Designation
National Monument
MA
State(s)
CA
42
Latitude
38
-71
Longitude
-119
Size & Visitation
44
Total Area
800
2,383,812
Annual Visitors (2025)
99,652
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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)).