In 2015, the Pike Place Market Preservation & Development Authority removed approximately 2,350 pounds of gum from the walls during a massive professional cleaning project.
The tradition began when patrons stuck their gum to the wall while queuing for tickets at the Market Theater.
The gum has been painted over and removed entirely multiple times, yet it returns to its full density quickly due to its status as an interactive public installation.
It is frequently cited as one of the germiest tourist attractions in the world by various travel publications.
The wall spans multiple surfaces near the entrance to the improv theater, extending around the corners of the alleyway.
The Gum Wall is a brick surface located in Post Alley beneath Pike Place Market, characterized by thousands of pieces of chewed gum deposited by visitors over decades. Originating in the 1990s as a line of theatergoers waiting for Unexpected Productions' improv shows, the installation evolved into an unofficial public art piece. The wall covers approximately 50 feet of wall space and has been cleaned several times by local maintenance crews to protect the structural integrity of the brick. Despite periodic professional power-washing, the surface is consistently replenished by tourists and locals within weeks. The site remains a landmark of Seattle's eccentric urban culture and serves as a backdrop for both casual photography and professional shoots. It is located directly beneath the city’s historic market district.
Stand slightly back from the main brick wall to capture the depth of the gum layers and the narrow, industrial feel of the alley.
Bring hand sanitizer or wet wipes, as the environment is inherently sticky and sanitary conditions are low.
Avoid touching the wall or leaning against it, as the residue can easily transfer to clothing.
Combine your visit with a trip to the nearby Pike Place Market for food and local shopping.
Do not wear clothing that you are worried about getting dirty, as the alley can be damp and surfaces are sticky.
Avoid leaning on or touching the brick surfaces; do not attempt to pry or remove gum.
