Ran 8k this morning and it was to be between 4:10-4:20/k pace. The run itself felt tougher than it should have been. My legs were a bit sluggish and it felt like the pace wasn't commensurate with my effort output.
1st k in 4:10
3rd k in 4:23 (slight uphill, but still slow)
4th k in 4:06
7th k in 4:11
I don't have landmarks for all the k's, and I'm not sure of the exact overall distance, but I ran my beach trail route in 34:55.