The U.S. Olympic Training Center is an all-weather, 150-acre complex trains 4,000 athletes per year, supporting their efforts to excel in Olympic archery, rowing, canoeing, kayaking, soccer, softball, field hockey, tennis, track and field, and cycling. Facilities here include North America's largest permanent archery range, an artificial all-weather field hockey surface, four soccer fields, a 15,000-square-foot canoe/kayak and rowing boat house, four tennis courts, a 400-meter track and a cycling criterion course.
Free guided tours are conducted from the Visitor Center when a tour guide is available - otherwise, you can pick up a map and take a self-guided tour.
Personal Experience: We went on a Sunday in August and the place was a literal ghost town. I was told by one of the workers that the best times to go are when actual events are happening, otherwise, it oftentimes is empty. It was cool walking in areas that we usually would not be allowed to get near but I much rather would have watched some Olympic-hopefuls do their thang!