LUBEC, Maine (AP) — Runners from 37 states and nine countries are taking part in a cross-border marathon that starts at the easternmost point in the U.S. and crosses into Canada.

Sunday's Bay of Fundy International Marathon begins in Lubec, Maine, and crosses a bridge into Campobello, an island community in New Brunswick, before ending in Lubec. About 500 runners signed up for the 26.2-mile race and another 300 for a 10-kilometer race.

Sue Keef, the lead organizer on the Canadian side, told the Maine Sunday Telegram (http://bit.ly/16qrr86 ) that organizers were hopeful they could get 200 runners and had to close registration when it hit 800.

Runners were cleared by customs officials before the race and are wearing bibs with electronic security tags allowing them to pass through the border checkpoints.