DIAMOND LAKE â The mountains in eastern Douglas County turned into a winter wonderland this December, which brought hundreds of visitors to Diamond Lake last weekend. âIâve never been here before,â said Desiree Walker, of Klamath Falls. âBut itâs a lot of fun.â Walker and her family came to the area to use the Hilltop Shop Snow Tubing Slide Hill. The tubing hill has five lanes and a conveyor belt to help people get to the top of the hill. Tickets are only available online this year and include the cost of renting the tubes. Visitors take to the tubing hill a...