have you looked into doing plyometric lunges or walking lunges? these really get your hamstrings sorted and it's using body weight only. watch out for your kness and keep your front angle at 90 degrees on the lower part of the exercise making sure your knee does not go over your toe. keep a nice wide stance to keep you stable and make sure all your weight is on the FRONT leg whilst pushing to stand back up.
also I used to to a lot of cross country running includind lots of hills wich REALLY workes your gastrocnemeus soleus and hamstring muscles as well as providing a cv workout.
apparantly ive got "legs like tree trunks in a good way" now!! i wasn't quite sure how to take that compliment considering it was from a guy, never mind!!
they are not as muscley as the guy in the picture on the link below, he is using weights but bodyweight lunges are also effective, go to "lunge exercise":
good luck!! let me know how it goes!
What's a good bodyweight/no equipment exercise that will work the hamstrings?
I'm looking for something I can stick into my metcons when I do them in the park on days I can't go to the gym and have no equipment, no place to secure my feet. So no glute-ham raises or hamstring raises.
All I've got so far are:
Good Mornings (unweighted)
and I'm not sure about the second one, I just know my hamstrings feel pretty sore after I do them...that may just be from the stretch they get.