Husband and I are separated. He took my two daughters to texas el paso where he is at.We marry in las vegas nv. Can i drive their to get them my self

Not nearly enough information to give a meaningful answer.  Where has everyone been living for the prior 6 months?  Are the kids in any immediate danger?  What is the Texas connection? Generally, "self-help" is a lousy idea that can lead to confrontations, unpleasantness, and sometimes violence. Start with the information posted at the link below (including the "Basics of Family Law Jurisdiction" article): http://willicklawgroup.com/child-custody-and-visitation/ Then consider filing a motion to obtain a "pick-up order" which will make recovering the kids MUCH more likely to succeed than proceeding without one.  If you have not consulted with competent family law expert counsel, you should do so before doing any of the things discussed above.