Given the date of December 9th (year unknown), this might have been a Texas Jeep Jamboree.

View all the information on eBay

“This is an original press photo. This rugged stretch was a typical part of the obstacle course “Over hill, over Dale, we will hit the dusty trail —-” Only here the dusty trail appears to hit back! This is a typical stretch of the rugged terrain through which the Jeeps traveled in the obstacle course event of the jeep jamboree. Autos – Jeeps Photo measures 10 x 8.25inches. Photo is dated 12-09-NONE.”