There are permits required for the JMT and unfortunately they are in extremely high demand. This means theres more people that want to hike the JMT every season than there are permits for.
Anyone backpacking along the JMT is required to have a wilderness permit. Luckily, you only need one permit to backpack along the JMT. Yosemite has recently implemented a new permitting policy because of the increased traffic seen on the JMT in recent years. The permitting system has gotten more complicated and can be fairly confusing. We’ll try to simplify it for you. Here’s all the info you need to know: