Marketing coordinator Jace Robinson says since March, there's been higher attendance every month other than July, and adds that August is looking good too.
The monument, which commemorates the Oregon, Mormon and California pioneer trails, has struggled to bring visitors in since its opening. Nearly 250,000 people visited in 2001, but last year's attendance was just under 50,000.
Several changes were made before its reopening in March; the attraction rebranded -- including a name change from the Great Platte River Road Archway to simply The Archway.
Robinson says many factors could have contributed to the rising attendance, including the opening of the Cherry Avenue exit off the interstate, which has eased access for visitors.