Bored

So something strange happened on my run today. I got bored. I thought it was that I was tired (which didn't make any sense because I knew my pace was slower than usual), but after talking to DH I realize now that I was bored. I had 10 minutes or so left and I just wanted to be done. I didn't feel like I was challenging myself enough. Anyways. Weird. I didn't think I would be bored so soon into my running.