Should I ride with a pulled hamstring?

If your hamstring is not bothering you while you ride it is fine to continue with your training, although you may need to back down the intensity to prevent further muscle tears while you are still healing. Be sure to ice after your workout to prevent further inflammation and muscle damage as well. For 7-10 days you need to stay in the saddle and pick relatively flat routes until you have no further signs of pain or inflammation in the muscle. Being cautious for the next week insures proper healing of the muscle fibers so you are ready to race come cross season. If for any reason your condition does not resolve within one week, or worsens over the course of the week, you need to consult a physical therapist or doctor.