Ran 4.1 miles today outside in 24 deg F weather. worked out pretty well.
Ran over past the elementary school and up to the school.http://www.usatf.org/routes/view.asp?rID=11135

Mile	lap time	split time	heart rate
1	11.24	11.24	169
2	12.14	23.38	160
3	11.55	35.33	166
4	12.50	48.23	165
4.1	1.06	49.29	169