Sweet deal. Splits to post?
A trail run sounds sweet...we definitely don't have any of those here. All flat, dry, windy, open road. My first is in 3 weeks; feeling pretty stoked. I don't know what you've done, but 2 months ago I couldn't swim 10 meters. I've been on my own with a few great books, and can put out my 400 without dying. It took being in the pool for 30 minutes per day, 6 days per week...more time in the water, and someone to critique should help you a lot!
Best of luck for the next one!