Radiating down the leg typically means sciatic nerve, but if it's outside edge it could be pain in gluteus maximus and/or tensor fascia latae going into the iliotibial band. Next time you go cycling, notice if you push with one leg more than the other. It could be that the hurting side is working too hard, or could be that you use the other side too much and overdevelopment of the muscles on one side is creating imbalance in the pelvic girdle and pain on the opposite side.
I do this kind of thing for a living. Not the hurting part, but the treating part. I do plenty of my own hurting, though, too. Keeps me learning.
Thanks Doc. 😄 This may be the problem. Sometimes it hurts more and sometimes less.
I'll keep an eye on it and I also started doing some stretching exercises before biking.
Oooooo yes! I love warm ups, and stretches after the big exercise to open things back up.