2 bed rail system?

I have a roll n lock cover which uses the bed rail track already is there a way to add another rail system? im trying to find a way to carry my mountain bike i have a double cab short bed

 

Pics? and did you want to stand the bike up? i dont really get what your tryin to say.

 

You have several options, but one (adding a rail track on the top of the bed sides) may interfere with your existing cover. If you look around this forum, you'll find several who have already done this (with pics).

However, if that does interfere with the cover, you have other options including a roof rack, hitch carrier, trailer, or similar. And, of course, there's always the cheap and easy solution - just unceremoniously tossing your mountain bicycle into the bed.