Lunch treadmill run at work. Didn't feel like running in the cold (25F). 2 mile WU at 8:00 Pace, 2 miles at 6:39 (9mph), 0.3 miles at 5:40, and then cool down at 8:00 pace.
It is frequently the case that when I get on the treadmill, my workouts tend to become speed work even if I didn't plan it that way. I just get bored and want variety and to get it over with. The threshold part felt good. I've run a half marathon at that pace in the past and I couldn't do that right now though. I haven't done speed work for 3 months so it will get easier.