I'm training for a 10 mile race coming up at the end of April, and its going pretty well. I've mapped out a bunch of routes and timed them with my watch, I'm cruising at a ~715-745 pace. About 2 months ago, I decided to add trail running to my workouts to keep boredom away and add a bit of cushion under my step. I just did those runs by time, ie, an hour run is ~8 miles, etc.
Well things were going great until I bought this GPS watch, a garmin 410. My street pace is spot on with what i've mapped out, but I've found that my 1h:30 trail run is less than 10 miles! That puts my trail run pace around 9:20.
The question is, how should I put these runs into my schedule? An hour run on the trail makes me about as tired as an hour run on the road, its just less miles.