I am Takeshi Takita, musher (dog driver), tour guide, owner of mushing works.
Many guests who do not know how big Hokkaido island want to come and enjoy our dog sledding from Niseko area. Niseko is over 250km far away from Mushing Works. It takes over 4hours (5 hours in winter time) by car.
I do recommend you stay in Tokachi area like Obihiro city on your tour day before. It's more comfortable and safety traveling.