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

Iditarod, the most grueling single-ride endurance test in the world, is a 350-kilometer mountainous journey through Alaska's tundra. The event was previously known as Idiabike and has been dubbed "the last great race" due to its extreme conditions.

Location: Alaska

Date: February 28th

Must-watch for its sheer brutality; only those with superhuman willpower can complete this challenging event amidst Alaskan winter's harsh environment.

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

Crankworx Rotorua

Crankworx Rotorua hosts an innovative five-day format of events and competitions that redefine the culture of mountain bike racing.

Location: Rotorua, New Zealand

Date: March 9th to March 13th

A must-watch for witnessing the first major slope-style competition of spring season held at CranKworx Rotorua. Last year saw Brett Rheeder claim victory; can we expect another new star to rise in this year's event?

Loic Bruni competing at the Lourdes Downhill World Cup round in France

UCI MTB World Cup

The UCI Mountain Bike World Cup returns to Lourdes with Loïc Bruni aiming to maintain his title as champion after winning his first-ever world championship title in just his first season.

Location: Lourdes, France

Date: April 9th-10th

Must-watch for seeing reigning champion Loïc Bruni defend his title against formidable opponents like Nino Schurter and Mathias Flückiger.

The men start the XCO World Cup in Nove Mesto.

UCI XCO MTB World Championship

This marks a significant change for UCI World Championships where cross-country and downhill races are held separately. The cross-country championships take place from June-end till July-beginning in Czech Republic.

Location: Czech Republic

Date: June-end till July-beginning (exact dates TBA)

Watch out for potential dark horses emerging during these championships as they compete against established stars like Mathias Flückiger and Lukas Flückiger who have shown exceptional skills before.

Coco Zurita performs at BMX Vert Finals at X Games Austin

X Games

Celebrating three years since its arrival in America, X-Games brings back thrilling BMX Park, Vert & Dirt competitions that attract global attention among fans of action sports. Daniel Sandoval hopes to repeat last year’s success while Daniel Dhers' wealth of experience makes him another contender worth keeping an eye on during this prestigious event scheduled from June2nd-5thin Austin Texas USA.

Location：Austin，Texas，USA

Date：June2nd-5th

Must watch because it showcases top-notch riders vying for victory amid intense competition between seasoned athletes such asDaniel Sandovaland newcomers looking forward their debut appearance within high-profile stages like X-Games Austin where dreams are made or shattered.

环法自行车赛Ring around France Bicycle Race

In anticipation of celebrating over one hundred years since inception (103rd edition), this annual race promises excitement by climbing famous landmarks including Ventoux Mountain(Mont Ventoux). Chris Froome won last year but Peter Sagan remains highly regarded competitor capable of pulling off upsets given his strong climbing abilities combined with extensive time trial experience making him key player not only among favorites but also potential winner too!

Location：France

Date：July2至21日

Must see because it provides opportunity observe performances by multiple contenders trying their lucks under pressure situations which may result unexpected surprises along way leading towards final podium finishes!