Yes.

I remember my first ride on what is now my regular after work ride, 7.8 miles one direction out and back (15.6 total). I was nearly dead that first ride coming back, stopped multiple times, took over an hour for me to complete the back leg. I couldn't go, and I nearly did fall over in that grassy patch. It takes conditioning, but you will adapt to riding. I now do it in about half the time, at what is to me a leisurely pace without too much effort.