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

Iditarod, the most grueling single-ride challenge in the world. The race formerly known as Idiabike is a 350-kilometer endurance test that pushes cyclists to their limits through treacherous Alaskan tundra.

Location: Alaska

Date: February 28th

Must-watch for its sheer brutality and the extraordinary willpower required to complete it in extreme sub-zero temperatures with minimal resupply.

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 bike culture meets reformatted events. This includes a five-day schedule of competitions and big-mountain riding culture.

Location: Rotorua, New Zealand

Date: March 9th - 13th

Must-watch for the springtime's first major downhill event held at CranKworx Rotorua featuring an extreme slope-style course where last year's champion Brett Rheeder claimed victory; will we see another rising star take center stage this year?

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

Loic Bruni © Lukas Pilz

UCI MTB World Cup:

Location: Lourdes, France

Date: April 9th -10th

Must-watch for Loïc Bruni, the young French sensation who won his first world championship title last season; can he maintain his dominance on the podium?

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

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

UCI XCO MTB World Championship:

A historic split between cross-country and downhill events takes place this year with two separate championships held over June-end July-start dates. First up is June-end July-start’s Nové Město Cross-Country Championships.

Location: Czech Republic

Date: June28 - July3

Watch closely as unknown dark horses may emerge from among competitors vying for victory; Mathias Fluckiger and brother Lukas have potential to claim top spot.

X Games celebrates its third anniversary in America by offering BMX Park, Vert & Dirt races.

Location: Austin , USA

Dates : June2-5

Must-watch Daniel Sandoval defending his park title against formidable opponents like Daniel Dhers who has won five X-Games Park titles.

Ringling Road Bike Race

103rd edition of Ringling Road Bike Race taking place this summer starting from Mont Ventoux climbs. Last year's winner Chris Froome is highly favored but Peter Sagan could be lurking underdog contender.

Location : France

Date : July2-21

Track Mikhail Ignatyev from Russia , Paolo Aste from Italy , Thomas John from Germany performing during Moscow-Kostroma leg of Red Bull Trans-Siberian Extreme

Trans-Siberian Extreme,

the longest multi-stage race globally spanning across Russia covering an incredible distance of approximately9159 kilometers.

Location : From Moscow to Vladivostok (total length =9195km)

Dates : July5-28

Brandon Semenuk performs daring no-hander stunt at Red Bull Joyride

Red Bull Joyride,

Canada Whistler Mountain Biking Park 's Boneyard turns into a global Slopestyle contest stage once more.

Location : Whistler Mountain Resort Canada )

Date(s) : August(Exact date TBA)

Must watch battle between Brandon Semenuk (four-time Joyride champion) and Brett Rheeder as they vie for supremacy atop global stages.

Aaron Gwin trains on finals day during Val di Sole Downhill World Cup event

UCI DH MTB Worlds:

Val di Sole Italy )

August8-11

Focus on Aaron Gwin who dominates tracks worldwide yet lacks one coveted rainbow jersey win; could this be his momentous breakout season?