Ran outside today - 30 minutes, so I'm thinking that's probably about 2.5 to 2.75 miles as I am slow, and especially on the hills, of which there are a couple long doozies on this route (around our work campus). It was a lovely day, though -- mid 60s with sunshine. I'm not much of a runner, been doing 3-4 mile treadmill runs on the treadmill over the winter, so getting outside is at least a step, and it feels good to be pushing myself. Even though it's a short distance I'm running, I feel good that I am able to run that far without stopping to walk on the hills now! 
And I'm even more in awe of those of you who do half and full marathons.
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow