If you drive along the A418 past Helensburgh and Rhu, head toward the Naval Base and when you get between the 2 base gates (about half way along the fenceline) and there is a small right turn which takes you up a narrow winding road up toward Glen Fruin, there is woodland along the Fruin road. Alternatively, go the other way through the Glen from the A818 (turn up the 818 off the A82 by Arden).