as of June 24 2017, you are required to be Level 25 to participate in Raid Battles. This is the first wave of players given the opportunity to raid during the Raid Beta period.
Niantic hasn’t given any confirmation whether or not lower level players will be able to raid in the future, however, it’s highly unlikely that they won’t.
Our GAME_MASTER research and data mining has shown the following to be true:
- Several Raid Rewards have lower level requirements
- Other Raid Rewards have no level requirement
We expect the raids to fully roll out until early July 2017, with lower level players being gradually introduced to Raid Battles