Director Alex Smith, whose film Walking Out premieres at Sundance London this weekend, on his love for his home state, ‘Big Sky Country’

I’m on a quest, with my twin brother, to make five films in five parts of Montana. The latest, Walking Out, is number three. Montana is our canvas for stories about the American west and man’s connection with nature. It’s a very cinematic place and has become our muse. The film’s based on a short story set in Montana – something I read when I was about 14, the age of the main character. It’s about an estranged father and son surviving in the wild.

I grew up on a ranch of sorts in the west of Montana. It was surrounded by mountains and streams, about a mile from the Blackfoot river, where A River Runs Through It was filmed. It was a community of ranchers and loggers, but our parents were more hippie bohemians. We spent a lot of time in nature, goofing around in the woods – there were always chores though, mending fences, chopping wood. There was no TV reception, but we’d go to the arthouse cinema in the nearest college town – it’s what made me want to make films.

This is called Big Sky Country and it’s one of those things that you can’t really explain, but when people show up they get it immediately. It feels like there’s a lot of sky stacked up on top of us, layer upon layer of it.

Montana’s a very big state with a very small population. You have a lot of elbow room and feel you’re a small part of a vast wilderness. It’s ruggedly beautiful but can be daunting. People who choose to live here embrace the wildness and harshness: they’re stoic and self-sufficient but they like to hang out – they’ll drive 100 miles for a beer.

Montana appeals to writers, the vastness is provocative and inspiring: Jim Harrison, Tom McGuane, Norman Maclean, and native American writer James Welsh (whose Winter in the Blood was adapted into our second film) to name a few.

Every season has its magnificence but I’d suggest coming in summer. You have these really long days and amazing starry nights. Just hit the road and see where it takes you. I’ve been to most of the national parks in the US, but there is something special about Glacier national park. Even in the summer, when it’s well visited, you can easily get off the beaten track and feel like you have it to yourself.

I’d recommend people get out on the rivers. Try for Smith river – you have to put in for the annual permit lottery as numbers are restricted. It’s a four-night, five-day river float along 60 miles of river and you can raft, canoe or kayak and camp on the banks at night. It’s so peaceful. There are also several companies that run trips if you don’t want to go alone or don’t get a permit.

There are seven first nations reserves in Montana and even more tribes. Powwow season (spring and summer) is a beautiful, powerful experience. Tribes gather for drumming and dance competitions, parades and rodeos. You can dip into the real history of America’s first nations. Blackfeet reservation has a rodeo and Powwow happening simultaneously in the main town of Browning. So you can have the Powwow and Indian cowboy experience at the same time.