Lone rider embarks on a frozen odyssey © Brudder/Getty Images

Iditarod, the world's most brutal solo bike race. A 350km grueling mountain road endurance test for riders who must brave extreme cold and scarce supplies in Alaska's tundra.

Location: Alaska

Date: February 28th

Must-watch reason: Only those with extraordinary willpower can complete this arduous race, as the Alaskan winter environment is extremely harsh and not for the faint of heart.

Tomas Zejda soaring at Crankworx Slopestyle in Rotorua, New Zealand on March 29th, 2015

Crankworx © Graeme Murray/Red Bull Content Pool

CranKworx Rotorua, where mountain biking culture thrives. The event features a five-day schedule with new competition formats and big mountain trails.

Location: Rotorua, New Zealand

Date: March 9-13th

Must-watch reason: Witness the first spring downhill event at CranKworx Rotorua with its legendary slopestyle course. Will we see another rising star take the lead after Brett Rheeder's victory last year?

Loic Bruni competing at the 2015 Lourdes Downhill World Cup round in France’s famous pilgrimage city

Loic Bruni © Lukas Pilz

UCI MTB World Cup

Location: Lourdes, France

Date: April 9-10th

Must-watch reason: Loïc Bruni emerged victorious in his first season as champion; can he maintain his dominance and claim another title?

The men start their ride at Nove Mesto during the UCI XCO World Cup in Nove Mesto.

Nove Mesto World Cup © Bartek Woliński/Red Bull Content Pool

UCI XCO MTB World Championship - a historic separation of cross-country (XCO) from downhill (DH). The championship will feature two distinct events held separately across different times and locations. First up is June-end to July-starting cross-country races in Czech Republic.

Location: Czech Republic

Date: June 28-July3rd

Must-watch reason：As all eyes are on Rio Olympics this year，the world championships might surprise us by crowning an unknown talent among numerous competitors。Mathias Fluckiger has an opportunity to outshine others like Nové Město。

Coco Zurita performs at BMX Vert Finals during X Games Austin.

Coco Zurita/X Games © Garth Milan/Red Bull Content Pool

X Games - celebrating its third year in America with thrilling BMX Park、Vert、and Dirt competitions。

Location：Austin，USA

Date：June2nd-5th

Must-watch reason：Daniel Sandoval won last year’s park competition；but don't underestimate Daniel Dhers' experience as he holds five X-Games Park titles.

环法自行车赛

享誉盛名的环法自行车赛将于今年7月迎来第103届赛事。这一周长的比赛将会爬升著名的地标旺图山(Mont Ventoux)。去年冠军 Chris Froome 是一位非常全面的公路车手，他也成为本届赛事的夺冠热门.

比赛地点：法国

比赛日期：7月2至21日

必看理由：世界冠军Peter Sagan常常被外界视为赛事中的一匹黑马。但极具魅力的斯洛伐克人的爬山技巧正不断进步，丰富的计时赛经验让他成为赛事里值得关注的选手.

Mikhail Ignatyev from Russia performs during Red Bull Trans-Siberian Extreme.

Red Bull Trans-Siberian Extreme © Denis Klero/Red Bull Content Pool

Trans-Siberian Extreme

与传奇铁路西伯利亚遥相呼应，Trans-Siberian Extreme比赛是世界上最长分段竞速活动，从莫斯科出发横跨俄罗斯，全程9159公里。

事件地点从莫斯科到佛拉迪沃斯托克（全长9195公里）。

事件日期7月5日至28日

必看理由此次活动可能见证史无前例的人物和故事，因为它代表了一个真正意义上的冒险和挑战。