My second leg of Ragnar DC (leg 14) which was run in the dark. There are two occasions where I run when it is dark out - in the morning before the sun rises (and usually the sun is rising by the end of the run) or at dusk when it starts out still light and then becomes dark. This was one of the few times that I have completed a run outside when it is dark for the entire run. The course had some rolling hills, but my pace was pretty consistent - 8:12, 8:29, 8:29, 8:49. Overall the run was 4.6 miles in 39:21...an 8:34/mile pace.