There are two options for driving to Bamfield.
From Victoria via Duncan: Travel north on the #1 Island Highway to Duncan (1 hour). Just north of Duncan turn left on Hwy. 18, travelling west to Lake Cowichan. Passing through Lake Cowichan, you will enter a network of gravel logging roads. Follow the signs for Bamfield. The gravel logging road is approximately 110kms. Total travel time from Victoria is ~ 5 hours. Via Port Alberni: Travel north on the #1 Island Highway to Nanaimo. Continue north through Nanaimo, turning right at the Hwy. 4 exit for Port Alberni/Bamfield. Once you arrive in Port Alberni, follow the signs for Bamfield and the Pacific Rim National Park Reserve. You will enter a gravel logging road that is approximately 76 kms. Follow the signs to Bamfield. Total travel time from Nanaimo is ~ 4 hours.