Cycling star Gino Mader has tragically died ... succumbing to serious injuries he suffered in a horrifying crash at the Tour de Suisse on Thursday.
Mader's team, Bahrain Victorious, announced the sad news Friday morning ... explaining the Swiss rider was initially hurt after he lost control of his bike while traveling at a high rate of speed on a downhill portion of the race's Stage 5.
Tour de Suisse organizers said Mader tumbled into a ravine as a result of the wreck ... and when medical personnel first found him, he was laying motionless in a body of water.
Mader was able to be resuscitated at the scene and then airlifted to a nearby hospital ... but he passed away hours later.
"Despite the best efforts of the phenomenal staff at Chur hospital, Gino couldn’t make it through this, his final and biggest challenge," Mader's team said, "and at 11:30 a.m. we said goodbye to one of the shining lights of our team."
Bahrain Victorious officials added, "Gino was an extraordinary athlete, an example of determination, a valued member of our team and the whole cycling community. His talent, dedication, and passion for the sport has inspired us all."