This is not, as some might expect, the result of marijuana's having been legalized in the state, but due to Waterville's altitude. At an elevation of 2,622 feet above sea level, it is, indeed, the highest incorporated town in Washington State. A quiet little town with a downtown comprised primarily of a historic district, pretty much everything in the town is close at hand, including the town's public park, Pioneer Park.
Though the park is a block south of Locust Street, the official park entrance is on Locust, or at least that's where the sign has been placed. From the sign, it's a short walk of about 125 feet to the park proper and the shade of the many mature trees. In the dog days of summer, these alone make the park an inviting and quite popular place. The park is divided into two halves by Walnut Street (which is, sensibly, blocked to vehicular traffic) with the north half mostly open grassed area under many mature trees. In the south half are a small ball diamond, a children's playground and this tennis court.
Just a single court, it is surrounded by a tall chain link fence with gates at two corners, the northeast and the northwest. The surface is concrete; the entire facility has been maintained in quite good condition - very playable.