About Castleton

Family-Owned for Generations, the Property at Castleton is castleton

A Storied Backdrop for Life’s Memorable Moments

From Former Public Beach To Elegant Event Space

Castleton embodies the rich history and its natural lakeside surroundings on the banks of Cobbetts Pond. Since the late 1900’s locals and others from urban areas have visited, seeking to escape the heat of the cities. Dance halls were popular at the turn of the 20th century for people to gather together and listen to music.

We’ve kept with this tradition, creating an intimate space where celebration among family, friends, and coworkers is a top priority.


Privately Owned, Public Bathing Beaches

In 1972, George Armstrong purchased and combined Armstrong and Duncan beaches into what was, at that time, the only privately owned public bathing beach in the state of New Hampshire.

First opened their doors at Castleton Banquet and Event Center beautiful grounds in Windham NH

Doors Open at Castleton Banquet & Conference Center

The Armstrong portion of the property has been held by various family members for seven generations, and from 1987-88 Castleton was constructed. We proudly opened our doors September 14, 1988.

Present Day
Present Day

Thousands of Happy Guests Have Memorable Experiences

Since opening we have hosted wedding celebrations, baby and bridal showers, birthday parties for all ages, Silver and Golden anniversaries, trade shows, seminars, Proms and many holiday parties.


Everybody who hosts or attends an event here becomes part of our story. We’d be honored to become part of your story.

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Waterfront events at Castleton Banquet and Event Center beautiful grounds in Windham NH

BBanquet Rooms on the Water

The Castle and Ashby Halls can be configured many ways to accomodate an intimate event from 35 up to 800 guests. Rounds, high-tops and cocktail tables can be mixed and matched to meet your needs.

A Place to Raise your Glass

AA Place to Raise your Glass

Enjoy cocktails in our large, beautifully decorated lobbies complete with a baby grand piano, Disklavier, and an indoor waterfall.

Picture perfect setting at Castleton Banquet and Event Center beautiful grounds in Windham NH

PPicture Perfect Setting

Castleton's beautiful grounds include a waterfall, pergola, several outdoor fireplaces, footbridge, and fountain surrounded by Cobbetts Pond's serenity, offering the perfect backdrop for your special event.


Getting Started is Easy

Contact Us Today

Contact Us Today

Get in touch so our experienced staff can chat about your event needs

Schedule A Tour

Schedule A Tour

We’ll coordinate a site visit and walk you through the options for your special event.

Make Forever Memories

Make Forever Memories

Whether it's a family gathering, a corporate event, or a wedding, we’ll ensure an unforgettable experience.