Before attempting this you might want to upgrade the Subaru to S class, since on snow especially you need more horsepower to slide around.
After you do that, you can either go to the frozen lake and keep performing E-drifts and simple drifts or you can go to the Snow Park area, which is north of the Frozen Lake. The park has nice long corners with good camber and a jump in the middle of the figure eight, so you can keep lapping around while performing stunts.
Whatever you choose to do, wait for a Skill Song or use the Taking Requests skill from the Skill Shop (costs 10 skill points) to convince the DJ to play a skill song right away basically. Listening to the Timeless radio station is advisable since the skill songs there are longer.