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

Iditarod, the most grueling single-bike race in the world, is back. The 350-kilometer cross-country mountain bike endurance race takes place in extreme low temperatures and with minimal supplies across Alaska's tundra.

Location: Alaska

Date: February 28th

Must-watch reason: Only those with superhuman willpower can complete this brutal event, as the harsh Alaskan winter environment is far from what ordinary people can handle.

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

Crankworx © Graeme Murray/Red Bull Content Pool

CranKworx Rotorua redefines the mountain bike slopestyle scene. A five-day festival featuring new formats and large-scale mountain biking culture awaits us.

Location: Rotorua, New Zealand

Date: March 9-13th

Must-watch reason: The first spring enduro competition of the year unfolds at CranKworx Rotorua with its legendary slope style course. Will we see another rising star emerge after Brett Rheeder's victory last 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 returns to Lourdes for an exciting downhill experience.

Location: Lourdes, France

Date: April 9-10th

Must-watch reason: Loïc Bruni took home his first World Championship title last season; will he continue his reign of glory and dominate podiums once again?

The men start their XCO World Cup ride in Nove Mesto.

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

This marks a historic moment for UCI Mountain Bike Cross-Country Championships where both cross-country and downhill events are held separately for the first time ever. The XCO championship takes place between late June to early July in Czech Republic.

Location: Czech Republic

Date: June 28 - July 3rd (XCO)

Must-watch reason：As everyone focuses on Rio Olympics this year，the upcoming world championships could witness dark horse riders emerging from among thousands of competitors。Mathias Fluckiger has a chance to make history by winning Nové Město successfully。

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

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

Celebrating its third anniversary hosting events across America，X-Games presents thrilling BMX Park、Vert & Dirt competitions again this summer。

Location：Austin，Texas，USA

Date：June2nd-5th

Reason not to miss：Daniel Sandoval won gold medal last year but Daniel Dhers' rich experience makes him also worth keeping an eye on.

环法自行车赛

103rd edition brings excitement as it crawls up iconic Mont Ventoux.

Last winner Chris Froome is highly favored due to his all-rounded skills.

Location：France

Dates：July2nd -21st

Reason not to miss：Peter Sagan may be considered underdog but he keeps improving climbing abilities along with timing race experiences.

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

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

Trans-Siberian Extreme offers longest multi-stage adventure racing globally – over long distances through Russian land.

Starting point & ending point : Moscow & Vladivostok (total distance = approximately9195 km)

Dates : July5 -28

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

Brandon Semenuk / Red Bull Joyride / Scott Serfas/Red Bull Content Pool

Whistler Mountain Bike Park hosts Boneyard as part of Redbull Joyride.

Starting location : Whistler Canada

Expected date August（Please follow latest updates @ redbull.com)

Reason not watchable？ Brandon Semenuk vs Brett Rheeder rivalry heats up；Semenuk four-time champion while Rheeder’s talent shines bright；can Rheeder prove himself against reigning king?