Training to date:
Week 1: 2km run, 5km run
Week 2: 3km run, 8km run
Week 3: 7km hike, 10km run
Week 4: 12km run
Week 5: dive trip
Week 6-14: took a sabbatical from running
Week 15: joined the gym, ran 6km & 10km
Week 16: 9km (last night), 16km (sun)
Week 17: freak out
Week 18: Race day 21.5km

Pains:
pain in knees
slight stiches
chest constriction post run
no more thirst :)

Target:
21.5km in 2.5 hrs