| General | |
| Islands |
21 |
| Land acreage |
42,308 |
| (acres on mainland - 2,568) |
|
| Water acreage |
27,232 |
| Shoreline - miles |
155 |
| Annual boat hours for all park operations |
2,301 |
| Infrastructure | |
| Miles of Trail |
62.4 |
|
Miles of Road |
0.67 |
| Campsites |
67 |
| Administrative buildings |
41 |
| Visitor centers |
3 |
| Acres of lawn needing mowing |
39 |
| Public docks |
18 |
| Boats |
22 |
| Photovoltaic systems |
22 |
| Water distribution systems |
20 |
| Natural Resources | |
| Annual precipitation |
30 inches rain, 57 inches snow |
| Average daily temperatures |
July: 55° - 81°; January: 0° - 22° |
| Endangered and threatened species |
24 (3 Federal, 21 State) |
| Forest breeding bird species |
150 |
| Migratory bird species |
237 |
| Fish species |
40 |
| Mammal species |
38 |
| Flora species |
803 |
| Seacaves and beaches |
innumerable |
| Sandscapes |
16 |
| Cultural Resources | |
| Museum objects (13,000 on site) |
102,000 |
| Historic structures |
187 |
|
National Register of |
10 |
| Light station complexs |
6 |
| Light station towers |
8 |
| Light station buildings |
40 |
| Light station structures |
36 |
| Light station objects (Fresnel lens) |
1 |
| Known archaelogical sites |
52 |
| Known logging camps & associated sites |
34 |
| Historic quarries |
4 |
| Fisheries and fish camps |
3 |
| Historic farm sites |
7 |
| Submerged (e.g. shipwrecks) |
12 |
| Historic resorts and resort sites |
3 |