I found a FitBit on 13th Avenue East on the night of Friday, July 7. I was leaving Movies in the Park at Leif Erikson Park, and since someone had been parked there earlier, I suspect you were as well.
If you think it’s yours, post your email address in the comments here and I’ll send you an email. Tell me about it – model, color, band style, band size, etc. and its yours.