What would be a reasonable goal 5K based on the following workout:
4 x 1 mile (5:26, 5:22, 5:20, 5:17) w/1 min rest between each (felt like a threshold effort, not too hard)
(4 min rest after mile repeats)
finished with 5 x 300 (50, 51, 50, 49, 48) with 1 min rest between each