Follow the A30 west, either from Exeter or the M5 (junction 30).

After about 70 miles, turn south (left) at the roundabout for Truro & Falmouth (A39).

After 6 miles, turn east (left) for St.Austell (A390).

After 5 miles, turn south (right) onto the A3078 for St.Mawes.