The city of San Marcos will host events Saturday commemorating the 20th anniversary of the Sep. 11, 2001, terrorist attacks.

A flag raising ceremony, poetry reading and bell ringing will take place at city hall, 630 E. Hopkins St., followed by a memorial first responder stair climb at San Marcos High School’s Rattler Stadium, 2601 Rattler Road.

The flag that flew over city hall 20 years ago on the day of the attacks will be raised at 8:40 a.m., followed by the reading of the poem “The Tolling of the Bell.” The historic fire bell will then be rung, followed by a moment of silence.

A temporary flower memorial will remain at city hall until about 4:30 p.m., and the public is invited to leave flowers at the memorial, or watch the event on the San Marcos City Hall Facebook page.

Members of the San Marcos Fire Department and other local first responders will participate in the city’s inaugural 9/11 stair climb at 8:46 a.m. Donning full emergency response gear, participating first responders will climb 110 flights of stairs in Rattler Stadium, equal to the number of stair flights within the World Trade Center towers.