From Nanaimo, take Highway 19 north and take exit 60 onto Highway 4 traveling west towards Port Alberni. Stay on the road through the majestic Cathedral Grove, pass through Port Alberni and keep going until you get to the T-junction. Turn right at the junction towards Tofino and travel through the Pacific Rim National Park. Driving time approximately 3 hours from Nanaimo.
You can also fly directly from Vancouver airport to Tofino airport in 1 hour.