What to do in Jefferson County, NY

Activities, attractions and tours

A historic stone castle on a lakeside island with a clear sky.
A stone castle with towers on a lakeside island, surrounded by trees and a larger building in the background.
A stone castle with multiple towers by a calm lake, surrounded by lush greenery and a partly cloudy sky.
A historic mansion with a red roof and stone towers by a lake.
A stone structure with a statue on top by a waterfront.

Things to do

Boldt Castle and 2 Nation Tour

Boldt Castle and 2 Nation Tour

Rp571.552
per adult
82% of travellers recommend
Boldt Castle and 2 Nation Tour
Kingston Shipwreck Cruise

Kingston Shipwreck Cruise

Rp670.557
per adult
Kingston Shipwreck Cruise
Rock Island lighthouse on Rock Island

Islands, Lighthouses, and Castle Tour on the St. Lawrence River

Rp482.247
per adult
Islands, Lighthouses, and Castle Tour on the St. Lawrence River
See all activities in Jefferson County
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What to do in Jefferson County

Stay near popular Jefferson County attractions

A historic stone castle on a lakeside island with a clear sky.

Boldt Castle

9.4/10 (1,063 reviews)
After visiting Boldt Castle, make a plan to see the other sights and activities in Alexandria Bay. Amble around the area's riverfront or seek out the local tours.
See properties

Day trip destinations from Jefferson County

A person ice climbing on a frozen waterfall surrounded by snow and trees.

Adams

A waterfall with people standing in the water.

Dexter