I hate to see this happen but it sure does. As an old timer I remember this one in 1978 National Cross Country in Seattle. I believe the entire field including Alberto & Greg were directed the wrong way:
December 04, 1978
Big Week For The Old Runaround
In back-to-back collegiate and AAU cross-country championships, the entrants were confronted by a variety of challenges, from finding a way to keep from freezing to just plain finding the right way to the finish line
Barry McDermott
Thus Salazar's biggest competition would come, in effect, from himself. Could he return with only four days' rest to master the steep slopes of the West Seattle Golf Course?
If the course was brutal, at least the 46° temperature was more hospitable than Wisconsin's. After the first mile Salazar was again in the lead. Gradually the competition dropped away until it seemed certain that either Salazar or Greg Meyer, who has run a sub-four-minute mile indoors, would win. Salazar is from Wayland, Mass. and Meyer from Boston. The two are good friends. As they raced, they proposed that they finish together, especially since the rest of the field, save for one lone runner, had somehow made a wrong turn and was hopelessly off course. As race officials vectored the addled athletes back and forth to get in the required 10,000 meters, Salazar and Meyer approached the final hill. And there they decided to sprint to the tape. For a moment Salazar surged ahead, leaning at what he thought was the finish line—except that his estimate was 15 yards short. He finished muddy and regretful. "Now I'm sorry we decided to run together," he said.
http://sportsillustrated.cnn.com/vault/article/magazine/MAG1094375/1/index.htm