I passed 2500 km for the year yesterday evening on a ride up north to my in laws. The ride up to their house is 29 km worth of mostly bike friendly roads across Spokane. There are a lot of flats and downhills so I can generally go pretty fast. Back at the beginning of July I did the same ride in just under 1:06 (26.6 km/h average), but yesterday I was able to shave about 4.5 minutes off my time to finish just over an hour total with a 28.5 km/h average. If my winter riding goes as planned I should be able to break an hour for the same ride without too much difficulty sometime next spring. At this point in my cycling development I can ride 20-23 km/h on my Trek for pretty much forever on level ground (at least that's my perception). I still haven't completely figured out my limitations when I try to go faster though. While I can push things up to the 25-30 km/h range for a while, I definitely feel like I'm using up my reserves much more rapidly and limiting my total range.