(MAMMOTH) Yellowstone National Park has released a prospectus soliciting proposals from businesses that might be interested in providing guided interpretive over-snow vehicle tours and a skier camp there. Park Spokesman Al Nash says the concession is located in the Canyon area of the park. Nash explains a business has been operating there for several years, providing a skiers camp and guided, interpretive, over-snow vehicle tours from that location. He says the contract is expiring, and because of the change in the way the park is now handling transportation events into the park, a new contract will not be awarded with a right of preference for the current operator. Nash explains the new prospectus implements the park’s new Final Rule for Winter Use by requiring the concessioner to provide tours as transportation events. Nash says those interested need to respond by the end of this month.