Misc Info

Hi, I'm relatively new to the area and recently heard about these hot springs. Have read many of the threads in this forum and have gotten alot of great information. My question is, for trip planning purposes, from the 138/15 junction roughly how long does it take to get to the springs? I plan on using the route where I pay the $4.00 since it sounds the simplest. 1/2 hour, an hour, more? Thanks for any info!