Fee: $6 adult castle admission
About this park
Gillette Castle State Park in East Haddam is home to a quirky stone mansion built by actor William Gillette, who was famous for playing Sherlock Holmes on stage. The medieval-style castle perches on a hilltop high above the Connecticut River and looks like something from a storybook. Inside, visitors can see the unusual interior, including handcrafted wooden fixtures and puzzle-like latches designed by Gillette himself. The grounds have trails, picnic areas and views across the river valley, and the mix of odd architecture and scenery makes it one of Connecticut's most memorable attractions. Castle admission is $6 for adults. Plan to spend a couple of hours exploring both the castle and the trails.
Gillette Castle State Park FAQ
Where is Gillette Castle State Park located?
Gillette Castle State Park is in East Haddam, Connecticut, at 67 River Rd. GPS coordinates: 41.4953, -72.4397. Get directions.
Is there an entrance fee at Gillette Castle State Park?
$6 adult castle admission. Fees can change by season, so confirm with the park before you go.
How do I contact Gillette Castle State Park?
You can call (860) 526-2336 or email deep.stateparks@ct.gov. The park office can confirm RV site availability, hookups, length limits and current conditions.
Are there RV campgrounds near Gillette Castle State Park?
Yes. The closest RV-friendly campgrounds listed on ParkedRV are:
- West Thompson Lake Campground (42.3 mi, reservable)
- Indian Hollow (62.2 mi, reservable)
- Camp Gateway- Brooklyn Ny (97.7 mi, reservable)
How current is this information about Gillette Castle State Park?
This listing was last updated on September 20, 2026. If something is out of date, let us know and we'll fix it.