Enrollment later dropped when two more high schools were added in the Parker area, when Chaparral opened and then later, Legend.

The school earned an "Excellent" rating by the Colorado Student Assessment Program in 2004, and a "High" score in 2005.

It was then delayed again due to a leaky gym roof that pushed the opening date back close to the end of the month.

[6] In 2005, Ponderosa teacher Nicole Rea Barnhart became a registered sex offender after it was discovered that she was having an intimate relationship with one of her sophomore students.

The date, April 20 (4/20) holds some significance to many people, as well as being the anniversary of the Columbine High School massacre.

Reports indicated that either a toilet bowl cleaner or ammonia was put in a plastic bottle along with a piece of tin foil.

Many newspaper stories expressed the opinion that it was not appropriate that Chambers charge the juvenile as an adult for what most would consider nothing more than a childish prank.

[9] On November 28, 2016, former Ponderosa security guard Gary Postell sexually assaulted a 15 year old girl on school grounds and was arrested at his home in Castle Rock the next day.

[10][11] The Ponderosa Mustangs have a total of 23 varsity sports activities which all distribute in the fall, winter, and spring.