Polar Caves Park
Rumney, NH
A glacial gorge in Kinsman Notch where a mountain stream disappears under giant boulders. About a mile of boardwalks leads past eleven boulder caves you can squeeze through or walk around.
The story
The gorge is named for the stream that slips out of sight beneath the boulders. According to the account the operators retell, the first documented exploration was in 1852, when brothers Royal and Lyman Jackman were fishing in Kinsman Notch and Lyman fell through a mossy opening into what became Shadow Cave. When logging threatened the forest, the Society for the Protection of New Hampshire Forests bought the property in 1912, and it remains conserved.
History source: lostrivergorge.com.
What you'll see
- Shadow Cave
- Eleven boulder caves
- About a mile of boardwalks
Tickets and timing
- Adults
- $24 online in advance May–June, $25 July–October (ages 4+); walk-up $28–29
- Kids
- Free for ages 3 and under
- Hours
- Seasonal. The 2026 season ended October 18; the operator expects to reopen in May 2027.
- Booking
- Buy online in advance for the lower price; walk-up tickets depend on availability.
Getting there
1712 Lost River Road, North Woodstock, NH 03262
- Montrealabout 134 miles
- Albanyabout 138 miles
- Quebec Cityabout 194 miles
Distances are straight-line from each city center.
Questions people ask
Do you need to book Lost River Gorge & Boulder Caves in advance?
Buy online in advance for the lower price; walk-up tickets depend on availability.
Where is Lost River Gorge & Boulder Caves?
1712 Lost River Road, North Woodstock, NH 03262
Checked on 2026-10-23 against lostrivergorge.com (park info and history). Prices and hours change, so confirm on the official site before you drive out.