Tasmanian horsewoman Stef Gebbie has spent seven-and-a-half months on horseback riding the breadth of the Australian outback.

The 27-year-old from Hobart recently finished a 4,500-kilometre journey from the Snowy River in south-east Victoria to Margaret River in Western Australia's south.

While Ms Gebbie's expedition is epic in scale, her motivations seem simple enough.

No money was raised nor any record broken.

Ms Gebbie said she just wanted a break from the stresses of everyday life.

"Everyone wants to be at peace and everyone wants that quiet, and this is how I've managed to find it, or as much as I ever will," Ms Gebbie said.

Nullarbor dream

The 27-year-old Hobart woman says she wants to ride across North America next. ( ABC Rural: Jon Daly )

Initially, Ms Gebbie's plan was to ride the Bicentennial National Trail from Healesville in Victoria to Cooktown in tropical far north Queensland, but drought has forced the closure of parts of the trail.

"Then I had a dream that I was riding across the Nullarbor, and I thought, 'Well, guess I'll go east to west instead of south to north', and the rest is history," Ms Gebbie said.

Her dream would soon take her beside the "breathtaking" cliffs of the Great Australian Bight and across the Nullarbor's vast expanse, which was not quite as desert-like as Ms Gebbie had envisaged in her sleep.

Stef Gebbie set out on her challenging expedition to find a bit of peace and quiet. ( ABC Rural: Jon Daly )

She and her beloved horses made camp where they could and mostly survived on roadside grass for the beasts and "a lot of muesli" for her.

Camped beside a bronze pool of water, sheltered from the scorn of a West Australian summer, and just three days' ride from her destination, Ms Gebbie seemed content, but it was not always that way.

"Initially I'd let myself worry, 'What if we don't find water today?' or 'What if there's no grass at camp?' or 'What if it starts raining now'," she said.

"But I quickly worked out there's no point worrying about that, because it doesn't make any difference."

She said she never felt boredom or loneliness on her mostly solo trek.

"I think boredom is more of a symptom of unhappiness or discontent than an actual thing of itself," Ms Gebbie said.

Stef Gebbie found good travel companions in her beloved horses, Richard and Tickles. ( ABC Rural: Jon Daly )

Richard misses journey's end

Of course, she was not exactly alone.

Her beloved horses, Richard and Tickles — the latter whose name quickly changes to Michael when he misbehaves — were there every step of the way.

Back at camp, Ms Gebbie soon busied herself by fetching water for Tickles from the nearby pool.

Seashells stained with desert-red dust dangled from the strap of her weathered Akubra.

"If you're lucky enough to have horses, you might only see them for a couple of hours a week, so it's quite humbling to spend 24 hours a day, week-in, week-out with your horses," she said.

About 300 kilometres from their destination, Richard succumbed to a mystery illness, and once recovered, was sent to Margaret River ahead of Tickles and Ms Gebbie.

The ordeal made for a heart-warming reunion at the end of the trip.

"Richard was out in the paddock and I went down there with Tickles and he came running over, very excited, with his tail in the air and a dandelion in his mouth; it was very cute," Ms Gebbie said.

Kindness of 'trail angels'

The journey was helped in no small way by the generosity of people, or "trail angels", she met along the way.

Stef Gebbie originally planned to ride north to Cooktown in far north Queensland. ( ABC Rural: Jon Daly )

"I had a little blog on Facebook that just started off being for friends and family; then it grew and became this real community network, which has been very helpful for me," Ms Gebbie said.

"People have been scooping me off the side of the road and inviting me in for dinner and a shower. It's a real privilege."

One social media follower went as far as to help the trio cross the arid Nullarbor with a support vehicle carrying hay, water, and dehydrated food.

Although happy to "crack a cold beer" at journey's end, Ms Gebbie said she would miss life on the road.

"There are obviously challenges, but they're all real-world challenges that you can break down and you have to deal with in a calm and rational manner," she said.

"Whereas back home, you can succumb to all these mental anxieties that aren't really real."

Ms Gebbie has now set her sights on a horseback expedition across North America.