Help with a wired internet connection

I need a ethernet connection in my room from my router but it is at the other end of my house. What would be a better option run an ethernet cable from my router under my house and up into my room, this would be have to be done with a 75 foot cable (my house is realy long), or use a wirerless range extender with an ethernet port.

P.S i can not move my router from where it is.

Range Extender