Writer/director Frank Hall Green took a trip to Denali National Park backpacking with his wife for 8 days in 2003. He then set the character Bart's trip in many of the exact locations he camped.
British actress Ella Purnell spoke in her American English accent from the moment she got off the plane in Alaska, all during production, 24 hours a day, 7 days per week, until she got back on the plane to London 6 weeks later.
The polar bear at the Juneau airport in the beginning of the film used to be in the airport in the city of Spokane, Washington, where Wildlike recently played and won best narrative and an audience award. A Spokane resident pointed this out in the Q&A.