R.E. Mountain Secondary is a public high school in northern Langley, British Columbia and is a part of School District 35 Langley. It originally opened in 1977 and was relocated to a new facility in 2019. As of 2014, the school no longer offers Grade 8 as Yorkson Creek Middle School took the position. As of the 2020-2021 schoolyear, the administration changed the schedule layout to a quarterly system as a response to the COVID-19 pandemic in British Columbia.