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Photo: Tradnor (talk · contribs), CC BY-SA 3.0 via Wikimedia Commons
There are a number of things to do in its vast 640 acres (259 ha). It lies along Lake Sammamish and the Sammamish River. There are sports fields, tennis courts, a climbing wall, a radio-controlled airplane field, a dog park, and the Velodrome, which is a bicycle racing track that connects with the Sammamish River Trail. Parking is $1/day per vehicle.
Marymoor Park, located on the north end of Lake Sammamish in Redmond, Washington, is King County's largest, oldest, and most popular park, with more than 3 million annual visitors coming to roam its 640 acres (2.6 km2). Among recreational activities available are various sports facilities, rock climbing, a 40-acre off-leash dog park and a velodrome. It is also one end of the Sammamish River Trail, a biking and walking trail. In addition, a radio control aircraft flying field and a pet memorial garden are within the park's boundaries.
© OpenStreetMap contributors
Live theater at the Redmond Town Center.
Located near the Sammamish River Trail, this bike shop is good place to rent a bike, helmet included.
The majority of the campus is comprised of office buildings closed to the public, but there is a Visitor's Center. It's not much more than a few small marketing displays, rather than a decent history or behind-the-scenes museum. There's also a large Microsoft Store, which to its credit does have a lot of exclusive merchandise you can't buy elsewhere. To give you an idea of how underwhelming the Visitor Center is, the most popular attraction appears to be taking photos with the large Microsoft sign in front of the building.