along (a river, coast, railway, etc.); on (e.g. a street)
along the river; riverside
seaside; seashore; coast; coastland
along the road; at the side of the road
(running) along a mountain; along (a chain of) mountains
along the north coast; along the northern sea shore
along the east coast; along the eastern seashore
along the southern coast; along the southern seashore