Now in its seventh year, this prestigious competition continues to showcase the best images taken by adventurers across the world.
This year the competition received over 18,000 entries by photographers from over 60 countries.
The overall winner and runner-up won't be unveiled until March -- but the nine category winners have been announced.
The creative categories include "Wildlife Insight," "Spirit of Travel" and "Young Outdoor Photographer of the Year."
Adventures big and small
Winner of the "At the Water's Edge" category is Witold Ziomek, from Poland, who photographed Th-rsm-rk (the valley of Thor) in Iceland. His spectacular shot captures this mist-ridden gorge from an elevated position, adding to the sense of grandeur.
Meanwhile, a particularly dramatic shot was taken by Mikolaj Nowacki, from Poland, who photographed the captain of a yacht traversing the Baltic Sea, en route to the Danish island of Christians-.
"It was a stormy day, but the captain -- who has more than 40 years of experience sailing in open seas -- remained completely calm and relaxed, even though waves were breaking over him every few minutes," says Nowacki in a statement.
Calmer moments were captured by British photographers Simon Baxter and William Mallet. Baxter photographed an eerie private woodland, taking home the winning shot in "Light on the Land." Meanwhile Mallet photographed snails on his asparagus plant in his garden.
Experienced and fledgling photographers
A new 2017 category was "A View from Above," aimed at drone photographers.
Tom Sweetman from the UK won this award with his vibrant shot of rushing rivers in Chiang Mai, Thailand.
Meanwhile, 12-year-old Josiah Launstein from Canada won the coveted "Young Outdoor Photographer of the Year" prize for his shot of a Sierra Nevada bighorn sheep in British Columbia in Canada.
"I love bighorns, and Sierra Nevada bighorn sheep are extra-special because they are an endangered species," says Launstein in a statement.
"Photographing at -25 C [-13 F] is always a challenge and I was afraid I wouldn't have time to get my camera on my tripod before the ram disappeared from view," he adds.
Launstein used his natural instinct to capture the moment for posterity.
The Outdoor Photographer of the Year competition runs in partnership with outdoor gear manufacturer Fj-llr-ven and the overall winner will win -3,000 ($4,180) worth of equipment, garments and accessories.
The grand reveal will take place live on stage at The Photography Show at the NEC, Birmingham, UK on March 17, 2018.
The Outdoor Photographer of the Year team has also compiled a book showcasing some of the best images entered into competition.
The book, "Outdoor Photographer of the Year: Portfolio III," has been published by Ammonite Press: RRP -25 -- UK publication date March 17, 2018, US publication date August 2018 -- RRP $35.
Check out other outstanding entries from this year's competition in the gallery below.
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