A skier launches through deep powder while filming Actually, It Is Rocket Science, Teton Gravity Research’s 31st annual ski film. The film will screen Sept. 23 at the Jim Santy Auditorium in Park City. Photo: Teton Gravity Research

Actually, It Is Rocket Science brings big lines, deep snow and Teton Gravity Research’s 31st annual ski film to the Jim Santy Auditorium on Sept. 23.

PARK CITY, Utah — Teton Gravity Research will screen its 31st annual ski film, Actually, It Is Rocket Science, at the Jim Santy Auditorium on Sept. 23, bringing a tongue-in-cheek look at the calculations behind high-level skiing.

The film follows professional skiers across mountain terrain in British Columbia, Alaska, Japan, Finland, Andorra, Montana, Vermont, and Wyoming, using the mountain as a laboratory to explore the physics, judgment, and instinct behind high-level skiing.

A skier descends a steep, snow-covered line in Bute Inlet, British Columbia, one of the filming locations featured in Teton Gravity Research’s Actually, It Is Rocket Science. The film screens Sept. 23 at the Jim Santy Auditorium in Park City. — A skier descends a steep, snow-covered line in Bute Inlet, British Columbia, one of the filming locations featured in Teton Gravity Research’s *Actually, It Is Rocket Science*. The film screens Sept. 23 at the Jim Santy Auditorium in Park City. Photo: Teton Gravity Research

Actually, It Is Rocket Science takes a tongue-in-cheek look at the calculations behind lines that can appear anything but calculated. Athletes navigate big-mountain terrain, gaps, transitions, speed, and gravity while pushing the limits of what is possible on skis.

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Filming locations include Bute Inlet, Haines, and other sites in Japan, Finland, Andorra, Montana, Jay Peak, and Jackson Hole.

The film features Kelly Hilleke, Teal Harle, Colter Hinchliffe, Kai Jones, Maggie Voisin, Nick McNutt, Parkin Costain, Karl Fostvedt, Keegan Killbride, Tim Durtschi, and other TGR athletes.

A skier drops through deep powder in Japan while a Teton Gravity Research camera crew captures the action for *Actually, It Is Rocket Science*. Photo: Teton Gravity Research.

The Park City screening is part of TGR’s 2026 North American film tour following the film’s world premiere in Jackson Hole. The tour will visit theaters, mountain resorts and outdoor venues across North America, with some stops featuring athlete appearances, question-and-answer sessions and special events.

Doors at the Jim Santy Auditorium, 1255 Park Ave., open at 6 p.m., with the film beginning at 7 p.m.