North of Bon Accord theirs lots gravel pits with big hills to climb. Follow Lily Lake road north till you come to a T, left then quick right, left at the Y. You cross a tiny bridge just follow that road you will start to see trails on the right and gravel and sand pits on the left.
Going to bruderhiem tomorrow by myself staging my the open area by the hill at the creek, Black Toyota Tundra, Black CR 250 if you see me come get me. Better/safer to ride with people.