No not a long run. I biked my running route from last Saturday with a few cuts. I was going to just do 10 but then it was such nice weather I kept going. My back started to ache so it was getting long but luckily on the downhill I could just stop pedaling and straighten up. Lots of hills in Alpine. More noticeable on a bike. Lots of bikers out too. I loved the ease of biking (minus back issues) with the cool breeze brushing over my face. It was a feel good easy workout. Should have done shorter since running hard tomorrow. The problem with biking is non-observant cars. As I started out after helping in my daughter's 2nd grade class, I almost did the exact fall as two weeks ago. I was cursing myself, "not the knee again, you knuckle head Julie". Somehow I saved myself but only a few yards ahead I was nearly taken out by the opening of a car door on the street side where I was riding. I swerved, got an adrenaline rush then thought "if I ran into that door, all my training down the drain" . Maybe I should go home and skip the biking. But as you read above I stuck it out. What a beautiful ride. Hope all of you have tried the pleasures of cross-training like swimming or biking. Try it. It really gives certain muscles a break. ENJOY.