sled down (something)
To travel on a sled from the top of something down to the bottom of it. We always go sledding down the hill behind our school whenever we get a snow day. With his leg broken, he managed to sled down the mountain by rigging his skis and jacket into a makeshift toboggan.
sled down something
to ride down something on a sled. I love to sled down the hill in the winter. This hill is too steep to sled down safely.