Any competitive challenges out there?

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I'm trying to lose these last 20lbs and it's been extremely slow going. I'm on point with my running and weight lifting, but I really love to eat and that's where I have those bad days. Can anyone point me in the direction of a friendly competition group on here that they know of? Maybe there's a challenge out there that has teams, and you have to go so many days without going over your calories, or run so many miles, etc. to "win".?
I've tried to search but I only use MFP on my phone app and it's not the best for searching groups.
Thanks guys!