As we were driving the road out of Monrovia Canyon Park, we had to wait for a ranger to move as his/her truck was blocking the road. It was at that time that we had noticed that they had half-closed.. This content is for subscribers only. See Membership Options. Login Visitor Comments: Got something you'd like to share or say to keep the conversation going? Feel free to leave a comment below... No users have replied to the content on this page Share your thoughts about what you've read on this trip report You must be logged in to submit content. Refresh this page after you have logged in.