Legendary crooner Willie Nelson performs with his son Micah Nelson's band, The Reflectacles, on Saturday, May 22, 2010 at Charley's in Maui, Hawaii. A spokeswoman said Nelson, who's been hanging loose in Hawaii, got his hair cut in the past couple of weeks. (AP Photo/Jessica Pearl) NO SALES
Police boarded his tour bus with drug sniffing dogs who alerted officials that there was something on board.
A search revealed the pot and Nelson was arrested, according to KXAN. He later posted a $2,500 bond and continued east toward Austin.
Nelson was reportedly heading to Austin from a recent show in California.