In case the speculation post left you with any doubts, Variety published an article announcing that The Challenge was renewed for another season.
This is great news, and goes to show that this old show still has life left in it. After ratings dipped on Battle of the Seasons, they rebounded during Rivals 2.
Hopefully the ratings on The Challenges continue to do well so there are more seasons to follow, but for now season 25 is confirmed!