The sun may be shining, but everyone knows that the weather in Colorado can change in the blink of an eye. It is time to break out the thermos and the hot chocolate, dress the kids in their snow suits and mittens and polish that antique sled. Sledding is a perfect way to spend a snow day Colorado, and the Denver area has plenty of hills designed for a little down-hill fun.

This recently renovated park is known as one of the top sledding locations in Denver. It is also the only city-sanctioned sledding hill. The park can get fairly crowded, but there is plenty of sledding space. Bring a picnic and enjoy the pavilion that showcases a beautiful 360-degree view of Denver, or take some time off the sledding hill to have fun on the new playground. Keep in mind that the Ruby Hill Rail Yard is for skiing and snowboarding only, so keep clear of that area for your own safety. ** Note: the Railyard will not be open in the 2011-2012 season due to lack of snow.

Located in Littleton, Sledding Hill Park is a favorite sledding location. Find this winter wonderland at the northwest corner of S. Kipling and W. Ken Caryl. Sledding enthusiasts of all ages can be found enjoying the fresh powder at this hill. There is limited parking, so be prepared to walk a bit from your car.

Cold not your thing? Check out the top indoor activities to do on a snowy day in Denver.

For fast and furious sledding, take a trip to Leadville. Dutch Henry Sledding Hill is known as the highest and fastest sledding hill in Colorado. Bring your own sled of course, but they do offer tube rentals on Saturdays and Sundays from 12:00 p.m. to 5:00 p.m.

Related: Top cross country ski centers near Denver.

This recreation center in Aurora offers winter fun for the entire family. The sledding area consists of two large hills that are sledding favorites for locals. Children tend to stick to the smaller of the two hills. However, there is a creek nearby, so proceed with caution.

On the next snow day, plan a family outing to Scott Carpenter Park. The sledding is perfect for families with small children. The hills are not too long or steep. The park also offers picnic spots and other amenities ideal for families.

Looking to get outdoors a little farther away? Check out the best state parks close to Denver.

Deborah Flomberg is a theater professional, freelance writer and Denver native. Her work can be found at Examiner.com.