Feel free to ask the bride and groom for recommendations for all ages, abilities, and levels of adventure. Check out a couple local suggestions in the linked AllTrails list.
The Omni Mount Washington Resort offers 27 holes of exciting links-style golf. You can email Vince.runyon@omnihotels.com to set a tee time. It's generally recommended to book tee times ASAP, as the course will likely be very busy this time of year.
Take a ride aboard the cog railway to the summit of Mount Washington, the most prominent mountain east of the Mississippi, and home to some of the world's most extreme weather (make sure to check the summit weather forecast and bring appropriate clothing!). Guests may also ascend Mount Washington via the Auto Road from Pinkham Notch.