I rode this past Friday after work from Lewiston, to Altura, to Elba, then onto Utica back to Lewiston. Overall I was very impressed for the state of the trails. They have been packing and grooming quite a bit from what I hear. The route I mentioned is mostly field riding, so there is a lot of drifting snow that keeps the trails good. From the other riders I have spoke to, I would stay north of I90. I heard up to Dover, and Plainview is also good.