Working with her husband, George, she is the writer, co-producer and co-director of six feature-length documentary films. Their first documentary, Fire on the Mountain, premiered at Mountainfilm in 1995, where it won the Grand Prize. Since that time Gage & Gage Productions has premiered five more award-winning documentaries at Mountainfilm, including Bidder 70, which is about Tim DeChristopher, an environmental activist who monkey-wrenched a 2008 BLM oil and gas lease auction that would have affected some of Utah’s most beautiful and environmentally sensitive public lands. DeChristopher, who has spoken at Mountainfilm, was sentenced to two years in federal prison in 2011. In 2016, the Gage's film Kickass Katie Lee premiered at Mountainfilm. The film profiles the infamous and inimitable Katie Lee, long-time activist and lover of rivers and canyons, who passed away in November of 2017 at the age of 98.