Adams National Historical ParkvsDevils Postpile National Monument
Devils Postpile National Monument has a higher Total Area (800 vs 24 acres), while Devils Postpile National Monument has a higher Annual Visitors (2025) (99,652 vs 48,726 visitors), while Adams 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
24
Total Area
800
48,726
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)).