Lean Legs?

You're lucky to have lean legs
Is the flat bottom something that runs in your family?
I ask because I know someone who could not beef up in that area to save her life. She was built exactly like her mom but her mom had a butt, but not much of one. She said she used to want more of a rear end, but did not know how to get one, then she had a kid and curved out a little bit.

I would guess that there are exercises you can do for the behind that would not bulk your legs. I use youtube A LOT. Maybe if you go there and do a search and look at the different types of exercises for your target area, you could find a few that are going to work for you.

Best of luck!

You may see newbie gains(esp if you haven't lifted before) but it won't bulk up your quads.

Women don't have the hormones to gain muscle like men do, so squat away and and enjoy the results.

Unless you're taking protein shakes and/or eating a high protein diet with enough calories, no type of weight lifting will add bulk. Squats (and other weight lifting exercises) will only make you more lean and tone. Don't worry about getting "thunder thighs" - it's not going to happen just from doing squats.

Here is a good video to show what I mean,, the parallel leg lift is very good and they always burn!!
http://www.youtube.com/watch?v=Jl_aqxzJveg

When adopting any sort of moderately high or higher intensity resistance training regimen, regardless of whether it is based on weights, bodyweight, or whatever, you will see an initial period of muscle growth as the body adapts to moving while loaded. This will happen regardless of whether you are eating at a deficit or not and what determines when it ends is genetics. This period is referred to as "newbie gains." It doesn't usually last long or make for significant gains in muscle mass (it is noticeable but not very much). Beyond that, however, gains in muscle mass will only happen if you continue to do high intensity strength training while eating at a calorie surplus.

In other words: Lift weights, accept that you will see initial muscle mass gains all over your body which, while not significant, will be noticeable, and then from then on enjoy yourself and reap the benefits that come from lifting heavy.

This pretty much sums it up: