My favorite winter activity is skijoring.  The dogs love it and it gets us all outside for some good exercise.  It tends to be pretty easy on the dogs too as they age and we have quite a few 13+ year old dogs still running.  We don’t go far.  Maybe 4 miles with the older dogs.  Some of the trails can be pretty hilly too but I think they like the up and down instead of running just on the flat.  Here is a short video that I took when we skijored at North Star Golf Course on Sunday.  In lead are Robin (13.5 years old) Chanel (12.5 years old) and Misty in wheel at a young 6 years old.