wow! great photos!
Personal favorites:

• "Strength: the hard work of climbing training"
  by @onethousandpics
• "ColorChallenge - FridaySkyBlue - Gravedad Cero"
  by @samuel-film
• "A Needle - Sportsphotography Contest Entry"
  by @nkera
• "Flying high on my bike."
  by @vinceboisgard
• "Lewati selagi bisa"
  by @denni.japro