I have almost 4000 miles under my belt now, having ridden since April of 2011. I am 57. The last couple of weeks I have been riding rural roads, a mix of gravel, dirt, and pavement on my hybrid bike. My average has ranged from 9.6 to a high of 10.7. The surface and the bike matters. I do much better on pavement with my road bike. As does time riding. Just putting time in the saddle will improve your speed.

Welcome to TE!