Hard 5k

Today did 2.5k warm up followed by 5km hard then 2.5k cool down. Amazing weather today, best we have had in months. Warm up was really nice, saw a mate out for a ride. Then started the hard work. 4 laps of a 1.25km track that has a bit of a hill in it. Started off strong did the first lap in about 4mins. Then slowed down a bit as I hit that hill again. Kept pushing through the rest of the run and ended up with a time of 17:47. Happy enough, would've been better if a had someone helping me push, but pretty tired after. Really slow cool down, calves were a bt sore. About 10kms in all