You Yangs facts for kids

You Yangs panorama, Spring 2024

The You Yangs are a series of bumpy granite hills that rise above the flat Werribee Plain in southern Victoria, Australia. They are located about 5 km (3.1 mi) west of the small country town of Little River. They sit 55 km (34 mi) southwest of the busy city centre of Melbourne and 22 km (14 mi) north of Geelong. The main ridge runs north to south for about 9 km (5.6 mi). A lower section extends west for about 15 km (9.3 mi). Much of this rocky natural area is protected within the You Yangs Regional Park.

The hills sit about halfway between the scenic Brisbane Ranges to the west and the ocean waters of Corio Bay to the southeast. Even though the highest peak reaches only 343 metres above the sea, the range towers over the flat landscape. People can easily see these hills from Geelong, Melbourne, and places even farther away. Visitors love exploring this special landscape to see amazing wildlife, climb huge boulders, and learn about ancient history.

History of the You Yangs

View of the Bunjil geoglyph from Flinders Peak

The You Yangs have a very long human history that began tens of thousands of years ago. Local First Nations peoples know this land as a sacred place full of ancient stories. The name comes from the Aboriginal words Wurdi Youang or Ude Youang. These words can mean "big mountain in the middle of a plain", "large hill", or "bald". Another meaning may come from the Woiwurrung term yow wong, which means granite stone.

The local Yawangi people knew how to survive in this dry environment. They carved and enlarged hollows in the hard rocks to create a deep well. These stone wells collected rainwater so families could drink even during long droughts. The surrounding land was called Morong-morongoo. This name honoured the murnong, a nutritious yam daisy plant that grew everywhere and provided tasty roots to eat.

A British explorer named Matthew Flinders became the first European visitor to climb these peaks on 1 May 1802. Flinders and three companions hiked up to the highest point to survey the wide bay. He called the hill "Station Peak", but leaders changed the name to "Flinders Peak" in 1912.

Famous artists have also fallen in love with these distinctive rocky outlines. Fred Williams, one of Australia's most famous landscape painters, spent many hours painting outdoors here using the plein air method. Filmmakers have also used the wild landscape as an outdoor movie set for television dramas like The Pacific and movies like The Dressmaker.

A massive outdoor stone artwork called a geoglyph rests upon the hills today. Sculptor Andrew Rogers worked with local Wathaurong communities to build a giant image of Bunjil. In Dreamtime beliefs of some Indigenous Victorian peoples, Bunjil is a creator spirit who takes the form of a wedge-tailed eagle. Workers used 1,500 tonnes of local rock to build Bunjil's 100-metre-wide wingspan in March 2006.

Geography and Nearby Towns

The You Yangs as seen from Werribee Racecourse, 2017

The You Yangs stand out because the land around them is so flat. Several towns and country communities surround the hills:

• Balliang sits 5 kilometres to the northwest.
• Little River is located 5 kilometres to the east.
• Lara rests 7 kilometres to the south.
• Geelong is a major port city 31.5 kilometres to the south.
• Werribee lies 37.5 kilometres to the east.

Freshwater flows near these peaks through small streams. A creek named Hovells Creek begins in the western hills and flows downward toward the sea. Another stream, Little River, winds around the northern and eastern borders of the park before emptying into the ocean.

Geology: How Did the Rocks Form?

Many people mistakenly think the You Yangs are an extinct volcano. Geologists classify these hills as an inselberg, which is an isolated rock mountain rising out of flat land. The story of these rocks began 365 million years ago during the Devonian period. Victoria was covered with ancient sedimentary rocks, and the ground surface was several kilometres higher than today.

Deep underground, a giant pool of molten magma squeezed upward toward the surface. This liquid rock cooled very slowly and underwent crystallisation before it could erupt. Because it cooled so slowly over thousands of years, minerals formed large, shiny crystals. White crystals of feldspar grew big and strong, alongside glassy grey quartz. Dark crystals of hornblende and shiny black biotite mica filled in the remaining spaces.

Geologists have discovered tiny crystals of allanite and titanite inside the rock. These minerals carry tiny amounts of radioactive materials like uranium and thorium. Scientists use these elements like an ancient clock to measure the exact age of the mountain. Dark grey patches called xenoliths are also trapped inside the stone. These are pieces of older sedimentary rock that fell into the molten magma before it froze into granite.

Over millions of years, rain and wind caused massive erosion across the region. Softer dirt and rocks slowly washed away, leaving the tough granite standing tall. Today, visitors can see huge rounded boulders called tors. Fractures formed when the rock cooled and shrank, creating the smooth, cracked shapes seen today.

Climate and Native Plants

The You Yangs have an unusually dry climate because of the nearby Otway Ranges. Mountains to the southwest block rain clouds, creating an area known as a rain shadow. The park receives only about 450 millimetres of rainfall each year. Because of this dry weather, the hills are covered with open grassland and woodland instead of dense rainforests.

Different kinds of eucalyptus trees grow at different heights on the hills:

• River red gum (Eucalyptus camaldulensis) grows along the damp valley bottoms and lower slopes.
• Yellow gum (Eucalyptus leucoxylon) thrives across the middle hills.
• Blue gum (Eucalyptus pseudoglobulus) grips the steep, rocky upper slopes.
• Other native trees include red box (Eucalyptus polyanthemos), grey box (Eucalyptus microcarpa), and sweet-smelling yellow box (Eucalyptus melliodora).
• Visitors can also spot manna gum (Eucalyptus viminalis), red ironbark (Eucalyptus tricarpa), and the cypress-like cherry ballart (Exocarpos cupressiformis).
• Golden wattles like silver wattle (Acacia dealbata) and black wattle (Acacia mearnsii) add bright colour when blooming.

The ground layer features hardy grasses, saltbushes, snowy mintbush (Prostanthera nivea), and drooping cassinia (Cassinia arcuata). Forestry workers in the past planted timber trees like sugar gum (Eucalyptus cladocalyx), swamp yate (Eucalyptus occidentalis), and brown mallet (Eucalyptus astringens). Park rangers now work hard to remove invasive weeds like boneseed (Chrysanthemoides monilifera) and climbing bridal creeper (Asparagus asparagoides).

Wildlife of the Ranges

The rocky woodland provides a wonderful home for Australian animals. More than 200 species of native birds fly through the trees. Hiding birds like the tawny frogmouth disguise themselves as broken tree branches. Honey-loving birds are very common, including the white-naped honeyeater, the white-plumed honeyeater, the New Holland honeyeater, and the brown-headed honeyeater.

Loud laughs from the laughing kookaburra ring across the gullies each morning and evening. Walking trails are shared with the sociable white-winged chough and the little crested shriketit. Colourful parrots brighten the treetops, including the eastern rosella, the crimson rosella, the tiny purple-crowned lorikeet, and noisy flocks of sulphur-crested cockatoos. Cheerful ground birds like the eastern yellow robin, the little jacky winter, and the bright scarlet robin hop through the grass.

Native mammals thrive safely inside the park. Large mobs of eastern grey kangaroos graze in open grassy fields at sunset. The spiky echidna digs through the dirt looking for ants, while the shy swamp wallaby hides in thick scrub. High up in the branches, gliders and possums wake up when the sun goes down. These nocturnal animals include the gliding sugar glider, the bushy brushtail possum, and the nimble common ringtail possum.

The park is famous for its wild koalas, which scientists have studied closely since 2006. Researchers identify individual koalas by taking photos of the unique black-and-white patterns on their noses. These sleepy marsupials spend one-third of their time resting and munching leaves in river red gum trees. In 2007, about 161 koalas lived in the study zone, but that number dropped to around 105 koalas by 2017. Scientists study four generations of koala family trees to learn how to keep them healthy.

Nearby, a special park called Serendip Sanctuary helps protect animals that are in danger of disappearing. Scientists and rangers there run breeding programs to help rare birds like the Australian bustard and the dancing brolga.

Fun Outdoor Activities

Families visit the You Yangs every weekend for fun outdoor adventures. While overnight camping is not allowed, visitors can enjoy lunch at many shady picnic grounds. Hiking trails lead adventurers up steep tracks to Flinders Peak for views of the bay. A two-day cultural walk called Mountain to Mouth covers 80 kilometres from the peaks down to the Barwon River river mouth to honour Wadawurrung traditions.

The cooler autumn and winter months bring perfect conditions for mountain biking and horse riding. Winter rain packs down the dirt tracks, creating firm trails that are free of summer dust. Runners enjoy a free 5-kilometre parkrun every Saturday morning starting near the Kurrajong Plantation. Next to the park, automotive engineers test vehicles at the Ford Australia You Yangs Proving Ground, while target hobbyists visit the Sporting Shooters' Association of Australia Eagle Park shooting range and a local paintball field. The You Yangs remain a treasured place where children and adults can learn about ancient Australian nature and enjoy healthy adventures.