I'm not that familiar with the Brown Snake (Storeria dekayi) but it seemed pretty easy to identify using online sources. Apparently they spend much of the time hidden under rocks or underground, where they eat worms and slugs. This one, that I saw on the Calumet trail in Northern Indiana, was probably moving from its winter hibernation spot.
This was just over a foot long, which is close to full size.
I teach economics at Kalamazoo College. My wife is also an economist. We were on sabbatical in Europe for the 2014-15 academic year. (Salamanca, Spain, followed by Oxford, UK.) We were in Uruguay for the 2006-7 academic year.