Koikyennuruff or Kooyingara are the highest mountains in Noongar Boodjar. In English they are called the Stirling Range. Alternatively Yonga Mia is the name of the Stirling Range. Yonga Mia is the mia (home) of the spirit kangaroo. The individual peaks are:
- Yongah Mia is the first mountain in Koikyennuruff. Yongah means man, wer Mia is the Dowak (Throw stick). Remarkably, from the air, the mountain clearly looks like a dowak. Read the story of What and Watami from the page on the Porongurups.
- Boola Miyel (Bluff Knoll) is the highest mountain in the south west at 1,099 metres above sea level.
- Mr. Dale's Journal of an Expedition from King George's Sound to the Koikyennuruff Range of Mountains. WIKISOURCE. Retrieved 2 January 2018
- Nyoongar Story Time Kalkanap (Kalgan) Bilya - Kalgan River. Our Place, Edith Cowan Uni. Retrieved 2 January 2018
- Stirling Range National Park. Parks and Wildlife Service, Government of WA. Retrieved 2 January 2018
- Noel Nannup. "The Carers of Everything". Module 2 - Boodja and spirituality: Spirituality and story. "Noongar Language and Culture". edX Curtin University. Course CAS1x. Retrieved 9 July 2020
- Chloe Papas. "Dreamtime stories: how the Great Southern ranges were formed". ABC Great Southern WA. 15 April 2014. Retrieved 11 July 2020
- Interesting WA Facts. Landgate, Government of WA. Retrieved 9 September 2020