Leaving a board in Trello
To leave a board in Trello, open the board menu on the right side of the board, click "More" and choose "Leave Board". This will remove your account from the board, which means you may no longer be able to access it.
If you're looking to close the board instead, see Closing a board.
If you're trying to leave a board after it's been closed, you can do so on this page.
Leaving a board if you're the only admin
Trello won't let you leave a board if you're the only admin or member of that board. A board must always have at least one admin. If this happens, we'd recommend either closing the board or making another user an admin of it: Making a user an admin of a board