相模川
The first 9 km of leg is marked with a gentle descent as the course gradually departs the urban areas towards the Shōnan . The runners join National Route 134 at Chigasaki, and travel along the coastline with Mount Fuji in front of them and Sagami Bay to their left. Leg 3 finishes after the runners cross the over Sagami River, and reaches the Hiratsuka relay station on the coast.