Motherhood Maternity sells longs online (not sure if they have them in the store). I have two pairs of long jeans from there, and I like them. I'm 5'10" and they are actually a bit too long.
Warning
No formatter is installed for the format bbhtml
I am 5'10", so I know how hard it is to find long pants! I just bought my first two pairs of maternity pants at Motherhood Maternity and every pants (I didn't try jeans though, only dress pants) were plenty long for me, so i was pretty happy.
I know Old Navy sells long sizes online but I couldn't find any in the store. Motherhood Maternity has long sizes in the store though, and I like their full panel pants better because they're softer and stretchier. Good luck!
same as everyone else. I'm 5'9 and the gap long jeans are great if I wear heels (shh, I know I shouldn't!) and motherhood long jeans are the perfect length.
Re: Maternity pants for the long-legged folk...
GAP sells longs. Also I have some Ann Taylor Loft Maternity dress pants that came in long/tall.