One of my objectives in the trip was a work assignment – photo this area Lake Powell for Offshore Marina, a Lake Powell Boat Rentals business located near Bullfrog Marina. It’s all part of their development of a great resource for boaters at Lake Powell , the Lake Powell Guide online. … Rainbow Bridge is one of the largest natural bridges in the world and is found at Lake Powell , a short boat ride from Bullfrog Marina or Wahweap Marina area (about 1 – 2 hours). …