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

Iditarod, the most grueling single-bike race in the world, is a 350km mountain bike endurance test that pushes riders to their limits in extreme cold and minimal supplies across Alaska's tundra.

Location: Alaska

Date: February 28th

Must-see reason: Riders must possess superhuman willpower to complete the event, as Alaska's winter environment is harsh and not for the faint of heart.

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

Crankworx © Graeme Murray/Red Bull Content Pool

Crankworx Rotorua

The reform of downhill racing continues at Crankworx Rotorua in New Zealand. The five-day schedule includes new competition formats and large-scale mountain biking culture.

Location: Rotorua, New Zealand

Date: March 9th-13th

Must-see reason: The first spring single-track downhill event takes place at CranKworx Rotorua with an exciting Kelly McGarry-designed course. Will we see another rising star emerge this year?

Loic Bruni competing at the 2015 Lourdes Downhill World Cup round in the famous French city of pilgrimage

Loic Bruni © Lukas Pilz

UCI MTB World Cup

Location: Lourdes, France

Date: April 9th-10th

Must-see reason: Loïc Bruni, a young French rider who won his first-ever UCI Mountain Bike Downhill World Championship title last season. Can he maintain his winning streak and dominate on stage?

The men start the XCO World Cup in Nove Mesto.

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

UCI XCO MTB World Championship

This will be the first time ever that UCI has separated cross-country (XCO) from downhill events. The two disciplines are held separately over different periods of time and locations. First up is June-end July-starting cross-country championship held between late June to early July in Czech Republic.

Location: Czech Republic

Date：June28 - July3rd

Must-see reason：As all eyes focus on Rio Olympics this year，the world championships could witness unknown dark horses emerging among numerous competitors，Mathias Fluckiger or his brother Lukas have a chance to break away from Nové Město successfully。

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

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

X Games Austin

Celebrating its third anniversary hosting events on American soil，X-Games offers thrilling BMX Park、Vert & Dirt competitions for fans worldwide.

Location：Austin，USA

Date：June2nd - May5st

Must-watch reason：Last year's park champion Daniel Sandoval plans to defend his title again but don't count out Daniel Dhers with his rich experience；he has taken home five titles from X-Games Park competition before.

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。这个历时3周的比赛将会爬升著名地标旺图山(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、前红牛车队车手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, Paolo Aste from Italy perform during Moscow-Kostroma stage Red Bull Trans-Siberian Extreme race.

Red Bull Trans-Siberian Extreme Race

Trans-Siberian Extreme

With legendary Russian Railway Siberia as its inspiration , Trans-Siberian Extreme race is one of longest segment races globally . From Moscow it traverses Russia full length of approximately 9159 kilometers .

location :From Moscow To Vladivostok(9195 km)

date :July5 th -28 th

must watch because Brandon Semenuk tuck no-hander at Red Bull Joyride

Aaron Gwin puts some practice into Val di Sole finals day

UCI DH MTB Worlds

Val di Sole Italy (Italy)

September8 th -11 th

Focus point:Aaron Gwin may be gold standard prize hunter for any track around globe but missing rainbow jersey medal list makes him hungry for more This season might be big one?