NEW PB in the 5km run

I'm in my last month of training for the Vancouver Marathon on May 4, 2008.
The first few months was 'base building' with high volume, low intensity.
Following, was Hill work outs to gain strength and finally we're into the speed sessions.

Last week's workout was 2km warm up followed by 1km intervals with 1km recovery.
The goal was to run each 1km inteval 15 seconds faster than the previous km.

Steve and Adam challenged me during the last to run the interval in 3:15. I was feeling REALLY strong for the first 700m. I went ahead of both of them to push the pace. Maybe it wasn't the greatest idea cuz 100m later I was going light headed. They caught up and we all ended up with a time of 3:14.

This week's work out was to run as far as we could in 24 mins, turn around and run the same distance in 22 mins. I stuck with the group on the run out which ended up being 5km. The run back I went as hard as I could because I wanted to see my improvement in the 5km. Here's my results since my first 5km race EVER:

May 14, 2006 - 22:16
Nov 25, 2007 - 20:50
Jan 8, 2008 - 21:17
April 9, 2008 - 20:00

Nick seems to think that I can run a 18:30 5km and Adam thinks I'll EASILY qualify for Boston (must run 42.2 km faster than 3:10:59). I'd like to test BOTH of these theories.

Have I mentioned that I LOVE training with people who are just as passionate (my word for obsessed) with running?