The premiere of a new climbing documentary starring Alex Honnold and Tommy Caldwell, two of the most famous climbers in the world, came to San Francisco in late October. The Castro Theatre was packed, but neither Honnold nor Caldwell was there.

Instead, two other climbers prominently featured in the film , “The Nose Speed Record” — “little-known climbers Brad Gobright and Jim Reynolds,” the promotional material called them — came from Yosemite National Park and charmed the audience.

Gobright, who died Wednesday after a fall during a descent in Mexico, was a self-described dirtbag, the fading term of endearment for climbers who live simply, and raggedly, for the single pursuit of climbing. (The climber Cedar Wright has lamented the slow extinction of “dirtbagging” in an age of climbing gyms.) Gobright was part of the furniture in Yosemite National Park, a friend to all the climbers but invisible to the millions of visitors.

James Lucas, a Yosemite veteran and an editor for Climbing magazine, recounted seeing Gobright a couple of weeks ago at the park’s Ahwahnee Hotel. Just a short walk from the places where Gobright lived in his Honda Civic, the Ahwahnee has rooms that cost several hundred dollars a night. Gobright once worked there. Now he was milling in the lobby among the loafered tourists.