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Visitor's Center Hours

Open 9:00am – 5:00pm


Printable Map


8am – Sunset Daily


For-Mar is a pet and smoke-free facility.

Site Key

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*Please call ahead if you are planning a special trip to the treehouse. The treehouse may be closed to the public due to field trips, scheduled programs or weather.

As children, most of us share a few similar dreams. We all dream about what we’ll be when we get older and many of us dream about having a treehouse.

Some of us are lucky enough to have a treehouse of our own, but for most of us it’s just a dream. That dream is a reality for kids and adults alike with a custom built, public treehouse at For-Mar Nature Preserve & Arboretum!

A couple of years ago, a group of kids at a Wild Adventurers program at For-Mar were tasked with presenting a proposal to Genesee County Parks Director, Amy McMillan. Their goal was to prove to her that a treehouse was a worthy addition for For-Mar and that it wasn’t just a cool thought that would lose its luster in a week like so many toys and fads do with kids. After truly impressing her, the Genesee County Parks Commission agreed to adding a treehouse and begun saving funds to make it possible. They also applied to Nelson Treehouse and Supply with a copy of the video from that presentation. Two years later, the Parks Commission had raised sufficient funds and had begun scouting locations for a treehouse when a serendipitous call from Treehouse Masters changed the plans.

Although a treehouse was in the plan, we had no idea that we would end up with a custom built treehouse from the “treehouse master” himself, Pete Nelson, but that’s exactly what happened. The Parks Commission had a small, but mighty, set of requirements for the treehouse when Nelson Treehouse and Supply began making their plans. The plan was to add additional classroom space because the Visitor’s Center space is operating at capacity and For-Mar’s popularity continues to soar. That meant it needed to hold at least 30 kids plus instructors. It also needed to be barrier free, allowing even those in wheelchairs to experience the joys of being in the trees.   

It was a tall order, but the crew at Nelson Treehouse and Supply came through with a beautiful AND functional design. It took a little over a month for them to turn that design into a reality, but now visitors of all ages and abilities coming out to For-Mar have the opportunity to experience a treehouse overlooking Kearsley Creek. Nestled in black cherry, red oak, white oak, basswood and butternut hickory trees, the treehouse stands approximately 30 feet above the bed of the Kearsley Creek oxbow and can be accessed be either staircase or the ramp with grades to meet ADA requirements.

The treehouse has an additional level of excitement as it was designed to be the headquarters for The Preservers, the Nature’s Superheroes that Genesee County Parks visitors have come to know. Inside you can see each of the characters cartoon faces on the walls, a present from Pete and the team. The treehouse build was featured on Animal Planet’s show Treehouse Masters in Januray of 2017, season 8 episode 3. Highlights from the build can be found on 

Explore For-Mar

rain drop

Nature Preserve

Field Trips


Barrier Free Treehouse


Sugar Shack


Visitor’s Center




Butterfly House