Her shoulder is pretty nice, and her croup really steep... I wont really judge her legs until she is standing on even ground, as the second picture does her no justice. It makes her butt look massive and her shoulders small, I think from the camera angle. I think once you put some more feed into her, and start muscling her up, her hind end will change dramatically. Her back is a tad longer, but overall, she is actually very nicely built :) I don't barrel race, so... take what I say with a half grain of salt; She looks pretty small to me, which I think is better for barrel racing. I think smaller horses have an easier time getting around the barrels, and running in a small pen. I think a barrel racer should have a medium length back, lean neck, pasterns that are shortish with good angles, a nice bigger butt well muscled, andd... Yeah... Barrel racing really just depends on the individual horse... I say, she might do nicely in barrel racing, but that's just my opinion