The picture was filmed on location on the Eiger mountain and Zurich in Switzerland, in Monument Valley and Zion National Park in the American Southwest, and in Carmel-by-the-Sea and Monterey in California. Special equipment and handheld cameras were employed to film the climbing sequences.

How much climbing did Clint Eastwood do in The Eiger Sanction?

Trivia (32) Clint Eastwood did all of his own stunts, including the scene where he cuts his safety line over a drop of at least 1,000 feet. The only stunt he did not perform was a 2,500-foot drop, for which a dummy was used. One climber, David Knowles, was killed by a boulder on the second day of shooting.

Has anyone climbed the north face of the Eiger?

The north face of the Eiger, a daunting 6,000ft wall of crumbling limestone, is considered Europe's greatest challenge. More than 700 climbers have reached the peak since the first successful ascent in 1938 and it was first conquered by a Briton in 1962.