The Mare Barn has stalls for 10 or 12 mares. The Louden-inspired rafter design creates an unobstructed loft, used for hay storage. It was built in 1910 by J. G. Maasdam.
The barn was mostly intact before restoration began, but the roof was covered with a rubbery-type material, perhaps added in the 1950's. Since it was wearing off, it was replaced with wooden shingles in 2008.
The original cupola was gone, so it was reproduced.
The interior was cleaned up and upgraded with new wiring to meet codes, and displays were installed.