The Chapel on the Rock (officially, Saint Catherine of Siena's Chapel) is a popular tourist landmark in Allenspark, Colorado visited by thousands every year. The chapel is located on the grounds of the Saint Malo Retreat Center, the Catholic retreat center for the Archdiocese of Denver, near Mount Meeker. In 1999, Boulder County designated the chapel as a historic site.
Pope John Paul II prayed at the chapel during his visit to Denver for World Youth Day in 1993. Afterwards, the chapel received his personal blessing. The Pope later hiked in the surrounding woods and spent some time at the Saint Malo Retreat Center.