Well, I just finished this ride yesterday. It was an amazing ride! I went from the John Wayne Marina east of Sequim to the west side of Port Angeles and back again. Here's the stats from the ride:
Distance = 49.52
Time = 3:55.09
Total Climb = 2,430 (lots of barometer change, this and max alt. could be slightly inaccurate)
Max Alt. = 385
Avg. HR = 146
Max HR = 177
Temp = 52*F
As you can see this was a relatively flat ride, mostly small rolling hills. It's not a great training ride as you can tell by my average speed, I've never gone that slow overall.
One more thing for those that have never done this trail. I would not recommend an aluminum frame bike. Maybe I've just been blessed with really smooth roads, maybe not, but this bike path was extremely rough. I took my commuter with 700cx32's and was still bumped around a lot.