What can I see and do at the 45th Parallel Bridge?

• Take a Photo: Capture the moment at the 45th Parallel Bridge, which marks one point on the 45th parallel that also crosses the globe through Venice, Italy, Ottawa, Canada and Minneapolis-St. Paul, Minnesota. This is an imaginary line circling Earth halfway between the North Pole and the equator.
• Swim in the Boiling River: The Boiling River is just one of a couple places in Yellowstone Park where folks can swim in the area's warm waters. The 140 degree springs spill into the cool Gardner River, where people have built up natural rock pools that are great for a dip anytime of year. Follow a well marked trail about .5 miles upstream from the sign to find the springs. The soaking area is closed from spring until mid-summer.

  Where is the 45th Parallel Bridge?

  The 45th Parallel Bridge is located between the Gardner River and Mammoth Hot Springs, on the park entrance road. There is a parking area right by the sign.