The Challenge 40: Battle of the Eras
| Battle of the Eras | |
|---|---|
| Season 40 | |
| Presented by | T. J. Lavin |
| No. of contestants | 40 |
| Winners |
|
| Location | |
| No. of episodes | 21 (including the two-part Reunion special) |
| Release | |
| Original network | MTV |
| Original release | August 14, 2024 – January 22, 2025 |
| Season chronology | |
The Challenge 40: Battle of the Eras is the fortieth season of the MTV reality competition series The Challenge, featuring alumni from The Real World, Road Rules, The Challenge, Are You the One?, Big Brother, Survivor, Love Island (U.S. and UK), Survival of the Fittest, and Exatlon (U.S.) competing in Vietnam for a share at a $1 million prize. A launch special titled "Eras Only" aired on August 7, 2024, followed by the season premiere on August 14, 2024.