The week before Labor Day hardly seems like the ideal time for contemplating a winter trek through Yellowstone National Park. But Tuesday, Sept. 1 is a key date for anyone planning to travel through Yellowstone by snowmobile as part of a self-guided group. That's the first day to submit applications online for the lottery system that allocates spots in the self-guided tour program. Under a newly implemented winter-use plan, last winter was the first season since 2003 that allowed sledders to tour Yellowstone without a commercial guide. Despite relatively warmer temperatures and sparse snow, winter recreational visits park-wide increased by 14 percent over the previous year. Continue Reading →