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

Iditarod, the most grueling single-bike endurance race in the world, spans 350 kilometers across Alaska's tundra in extreme cold and scarce supplies.

Location: Alaska

Date: February 28th

Must-watch reason: The unwavering willpower of riders is put to the test as they face harsh Alaskan winter conditions that few can conquer.

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

Crankworx Rotorua © Graeme Murray/Red Bull Content Pool

CranKworx Rotorua redefines mountain bike racing culture with its five-day schedule and new formats.

Location: Rotorua, New Zealand

Date: March 9th-13th

Must-watch reason: Witness the first springtime downhill event at CranKworx Rotorua featuring extreme slopestyle. Will we see a new star rise after last year's champion Brett Rheeder?

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

UCI MTB World Cup

Location: Lourdes, France

Date: April 9th-10th

Must-watch reason:

French young gun Loïc Bruni won his first-ever world championship title last season. Can he maintain his dominance on the podium this year?

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 marks a historic separation of cross-country and downhill events within UCI championships. The six-day event takes place from late June to early July in Czech Republic.

Location:Czech Republic

Date: June 28th-July 3rd

Must-watch reason:

As global attention shifts towards Rio Olympics, this year's championships might see unknown dark horses emerge among competitors. Mathias Fluckiger has an opportunity to succeed where others fail.

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

X Games

Celebrating three years since its American debut, X-Games offers thrilling BMX Park, Vert & Dirt competitions for fans.

Location:Austin USA

Date :June2nd-5 th

Must-watch reason:

Daniel Sandoval aims for back-to-back victories while Daniel Dhers' extensive experience makes him another contender worth watching.

环法自行车赛 (Tour de France)

The iconic Tour de France returns for its103rd edition next summer with three weeks of racing including climbing Mont Ventoux. Last year's winner Chris Froome is favored again but Peter Sagan may surprise everyone with his improved climbing skills.

Location：France

Date：July2nd -21st

Reason：World Champion Peter Sagan is always considered an underdog but continues to impress with enhanced time trial performances making him a must-witness competitor.

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

Trans-Siberian Extreme

From Moscow to Vladivostok spanning over nearly ten thousand kilometers.

Location：Moscow-Russia-Vladivostok

Date：July5 th -28 th

Reason:

Witness history unfold as riders embark upon one of their longest journeys ever.

Brandon Semenuk tucks into a no-hander stunt during Red Bull Joyride.

Red Bull Joyride

Whistler Mountain Bike Park hosts Canada’s premier Slopestyle event.

Location：Whistler BC Canada

Date：August [exact date TBA]

Reason:

A battle between reigning champion Brandon Semenuk and rising star Brett Rheeder unfolds as both compete for top honors.

Aaron Gwin practices before finals day at Val di Sole Downhill World Cup Round.

UCI DH MTB World Championships

In Italy’s Val di Sole from September8 th -11 st .

Reason:

Can Aaron Gwin finally claim that elusive gold medal?