Hey @Mariec91, 

Thanks for your post. At this time, there is a maximum limit of 25 participants (you and 24 other athletes) per Group Challenge. We want to help athletes find connections and motivation with their friends on Strava, and we believe that a more intimate environment was best for this. 

If you’re a subscriber, you have the option to create up to 25 Group Challenges per day, and therefore have the option to invite 24 additional participants in a different Group Challenge. We appreciate your feedback and suggestions regarding this feature.

Click HERE for more information about the Group Challenge feature. 

If you have more than 25 participants, you could create a club. While club challenges are not available at this time, you can create a club event. You can also find more info on clubs here. If you would like to see club challenges, you can add your kudos to this idea on our Ideas Board. 

UPDATE: We are pleased to announce that creators of Group Challenges can now invite up to 199 athletes that follow them on Strava. In order for an athlete to join the challenge, they must be a subscriber, have a free subscription trial, or have free challenges left. Creators can also allow other athletes in the challenge to invite athletes who follow them. From the challenge details screen, tap the three ellipses [...] in the top right to open the challenge settings, and then enable the toggle that reads “Allow Participants to Invite Others”. For more info on Group Challenges, check out this page. 

UPDATE ON GROUP CHALLENGES: Starting in August 2024, only Strava subscribers or users with a free trial will be able to create a group challenge, find out more here.