For US events, once you’re logged into your account, here, you’ll see your upcoming Rugged Maniac on the right-hand side of the screen. Click “View registration,” then on the next page, click “Edit” to the right of where you see the Team heading. Select the team you’re looking to join, or create a team, and continue to save changes
For Canadian events, simply log into your account and click "edit." From there you'll be able to join any existing team.