Hey Orions.Star
Are you still planning to do duathlon in February?
I did my first two last year, my first one was similar to yours in distance, but not in elevation! My times were brutal, but I finished. I was doing weights twice a week, (one day upper, one day lower), two rides a week - one usually sprint intervals and a long ride on the weekend and two days of running, one more intense with intervals, the other just a tempo run.
I worked way too hard on the bike during the race and sucked the energy out of my legs, so for the final run, I was toast.
Upped the intensity over the summer and impoved my run times, bike time was ok, but I didn't kill myself on the bike so that I could run that last 5.
You have the benefit of those hills and elevation! Can't wait to hear your race story!
"You can't get what you want till you know what you want." Joe Jackson
2006 Cannondale Feminine/Ultegra/Jett
2012 Trek Speed Concept 9.5/Ultegra/saddle TBD