On a recent 12-day (630 mile) trip, I averaged 10.9 mph (17.5 km/h). That's moving time. My bike weighed 75-80 lbs (35 kg). I climbed an average of 3,300 ft (1000 m) each day. Yeah, I'm a bit of a numbers geek (e.g., I averaged 21,822 pedal revolutions per day). You can read about my trip at http://www.crazyguyonabike.com/doc/SLC-Durango2011.

Here is a profile that shows the correlation between elevation (green line) and my speed (blue line).