Eastwood and company returned to the United States to the American Southwest, where filming resumed in Zion National Park in Utah; scenes were shot at Zion-Mount Carmel Highway, Zion Lodge, Checkerboard Mesa, the Narrows, the Hanging Gardens, the bridge over the Virgin River, and the Cave Route below the Cerberus Gendarme. Additional scenes were shot in Monument Valley at the Tyrolean Transfer, where a rope had been rigged by climber Eric Bjornstad, who noted that Eastwood was not only very fit, but also very capable when it came to performing physical stuntwork like this. Scenes were also shot at Rock Door mesa above Goulding's Lodge, where Eastwood and company stayed. After completing principal photography in late September 1974 in Carmel-by-the-Sea and Monterey in California, Eastwood hosted the cast and crew at his restaurant, the Hog's Breath Inn, for a wrap party. "The Eiger Sanction" was filmed in Technicolor, and was released to theaters with an aspect ratio of 2.35:1.