Though, with its ever-growing attendance area of Happy Valley, CHS outgrew its small building.

[4] Starting in the early-mid 2010s, students, staff, and families began to complain about the severe overcrowding occurring.

The district resolved to eventually close Sunrise Middle School, which sat on the eastern portion of the campus, to create extra classroom space.

Happy Valley Middle School opened in 2009, taking around half of the students from Sunrise, then Rock Creek Middle School opened in 2011, taking the other half of the students of Sunrise, marking its closure.

It became the new site for Rock Creek Middle School, receiving renovations to be able to hold the new students and create proper elective spaces.

The Clackamas High School SBHC provides cost-free checkups, mental healthcare, and dentistry.

On November 2, 2023 at 9:00am, a bomb threat was made to the school through an anonymous confession Instagram page.

[11]Clackamas High School campus lies on 69 acres (28 ha) with a small wetland nearby.

Of 589 students, 502 graduated, 69 dropped out, four received a modified diploma, and 14 were still in high school the following year.

[18][19] In October 2005, Clackamas High was named KATU's "Super School of the Month.