6104 SE King Rd., Milwaukie, 503-305-6222, urbanwarrior.fit.

Located inside a ginormous Milwaukie facility just outside Portland, Urban Warrior offers neither cityscape nor combat. Instead, it hosts American Ninja-themed competitions dreamed up by lifelong bros eager to replicate the thrill of their "adventure runs" through downtown Portland's waterfront. Equal parts boot camp and jungle gym, up to 10 contestants can climb, swing or scurry through a succession of DayGlo contraptions.