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Sullivan Rock to Mt Cooke, Darling Range Sullivan Rock to Mt Cooke, Darling Range

  • Full day
  • 18.4 km
    • Bush Walk Class 4

      Difficult trail with rough surface that may have very steep hills or extensive rock hopping. Directional signage may be limited. Bushwalking experience, navigation and emergency first aid skills, and good fitness required.

This 18.4km return walk on the Bibbulmun Track takes you to the highest point in the Darling Range, Mt Cooke.  A campsite (for walkers only - no vehicle access) is at the base of Mt Cooke so this is also a good option for an overnight walk.

Sullivan To Mt Cooke Dbca
Earn 3 Points Overnight Hike
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This is one of many short walks possible on the Bibbulmun Track which stretches 1000km from Kalamunda on the outskirts of Perth, to the historic town of Albany on the south coast.

This walk starts at Sullivan Rock, just over an hour's drive south of Perth. The Track leading toward Mt Cooke is generally relatively flat. It crosses a broad and interesting creek system and passes through stands of sheoak, banksia and jarrah.

After reaching Mt Cooke campsite the Track ascends 2km to the summit of Mt Cooke, the highest point in the Darling Range, at 582 metres. The view here isn't the best - so continue on past the summit to the southern side of the peak and be rewarded with spectacular views.

If you've decided to stay overnight you can of course set up your tent and leave your pack at the campsite before heading up to the peak.  This is a good overnighter for families with children 8 years and over.  You can find other family hike suggestions on the Bibbulmun Track website.

Sullivan Rock carpark to Mt Cooke Campsite and back (13.4km return) or to Mt Cooke summit and back (18.4km return)

Vehicle access
Sullivan Rock Picnic Area, Albany Hwy

Take Albany Hwy from Armadale to Sullivan Rock picnic area (9km south of the Jarrahdale Rd turnoff). Watch for the hiker warning traffic signs as well as an orange Bibbulmun Track sign on the left with the picnic area opposite on the right.

Track notes

0.0   From the Sullivan Rock picnic site carpark off the Albany Hwy a clearly signed walk trail goes across the highway and over the rock to the Bibbulmun Track. Follow the rock cairns over the rock.

0.8   Turn right on to the Track and descend steeply.

0.9   At gravel road (Millars Log Rd (no vehicle access permitted) turn left. 50m further on turn right onto old vehicle track and descend to cross creek.

2.3   Pass reference tree BW74/3. Almost immediately pass a well preserved log landing made of jarrah logs on the right. The landings were used to roll logs onto the railway carriages.

2.5   Trail turns left on old vehicle track to cross creek on substantial foot bridge.WA Christmas trees here have brilliant orange flowers in summer.

2.7   Turn right off old vehicle track onto old railway formation. Watch for evidence of logging railways and timber operations.

2.9   Pass reference tree BW74/2. The incision on the tree is on the far side.

3.0   Cross creek on substantial footbridge. Continue through broad, swampy area on old formation. Pass stands of WA Christmas tree and kingia often confused with the balga grass tree.

3.5   Cross old vehicle track. Soon after, leave old formation veering to the left onto walking trail.

3.6   Trail turns left off old rail formation by rocky creek.

3.8   Turn left again off old formation. Then soon after cross old vehicle track on an angle. Wander through a fabulous stand of sheoaks.

5.5   Veer left off old formation ascending slightly.

5.6   Turn left off track onto walk trail.

5.8   Cross gravel road (Cooke Rd – no vehicle access) and continue straight ahead on old vehicle track, again passing through fine stands of sheoak.

6.0   Reach spur trail for Mt Cooke Group campsite on right.

6.7   Descend to reach Mt Cooke campsite. Just beyond campsite, near the boot cleaning station, is the original location of Mt Cooke campsite, burnt in a bushfire in 2003. The old water tank remains and interpretive signage explains the extent of the fire. Retrace your steps to your vehicle.

Continue for a longer walk option

7.1   Cross creek on substantial foot bridge. Soon after skirt small perched wetland with paperbarks and other swamp species.

7.3   Cross another wandoo-lined creek on a smaller footbridge.

8.0   After skirting above a natural amphitheatre lined with mature butter gums (Darling Range ghost gums), cross watercourse.

8.9   After ascending through rocks and butter gum with views northwest and southwest, reach the Mt Cooke ridge featuring massive jumbles of granite boulders. Pass alongside a granite slab with views to Mts Vincent, Cuthbert, Randall and Dale toward the horizon.

9.2   Reach the trig point on the summit of Mt Cooke. Soon after traverse long granite ridge. The best views are from this ridge further south along the trail, between 100 and 500m. From the summit, retrace your steps to your vehicle.

The Bibbulmun Track offers a wide range of experiences, from a gentle stroll to enjoy the peace and beauty of the natural environment, to an epic eight week adventure camping out at the 49 campsites and enjoying the hospitality of nine communities along the way. Those that walk every step of the way can be registered as end-to-enders.

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Be trail ready for Sullivan Rock to Mt Cooke, Darling Range

Here is everything you need to know before visiting this trail.

Time / Duration

up to 8 hours return


18.4km return

What To Pack

Group B - Hiking & Long Distance Trails (Bushwalks and/or longer trails) required.

Trail Start

Sullivan Rock, South East of Perth, 68.6 km, 1 hour and 3 minutes’ drive (Albany Hwy)

Get directions

Trail End

Southern Side of Mount Cooke

Get directions

Bush Walk

Class 4

Difficult trail with rough surface that may have very steep hills or extensive rock hopping. Directional signage may be limited. Bushwalking experience, navigation and emergency first aid skills, and good fitness required.

Visit Trail Tips for further information.

Difficulty Notes

The hardest part of this walk is going up to the top of Mt Cooke. It is also the most rewarding part!


You can find a group campsite which offers a water tank, toilet and an undercover area but no sleeping shelter, If you need a sleeping shelter, you are welcome to use the Mt Cooke Campsite, which offers a sleeping place for 12-15 people and a water tank. Always take a tent as space is not guaranteed. Groups of 8 or more need to submit a Notice of Intent with the Bibbulmun Track Foundation.
  • Camping
  • Car Park
  • Public Toilet
  • Shaded Area
  • Sheltered Area
  • Water Access Points

Best time of year

April to December

Trail Access


Prohibited Items

No pets or bikes
Edge shaped like mountain horizon
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Overnight Hike

Earn the Overnight Hike badge when you complete this trail.

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6 trail goers have rated Sullivan Rock to Mt Cooke, Darling Range as 4 out of 5!

We love to hear from people who've been on our Western Australian trails, so it would be most appreciated it if you wanted to leave a review.

Matthew Bickley

Reviewed 13 Apr 2024, 2:48am

The mid section of the hike is quite bland as it mainly consists of flat terrain in the scrub but the views from Mt Cooke definitely made it worth it, the campsite and hut were very well maintained.
Profile photo for Ailie Clark
Ailie Clark

Reviewed 5 Mar 2024, 7:59am

Went in early March and was pleasant in the early morning, however around midday and later it got quite hot with the sun baking down.
Don't rely on filling up your water bottle at the campsite tank (like I did) as the water isn't potable.
Really like the hike to really immerse yourself in nature (although keep in mind that you can hear Albany hwy for lots of it). Overall, was a lovely hike that I reckon is mostly grade 3 and turns grade 4 only for the summit.
Big tip for the start: when you get over Sullivan Rock you want to turn right onto the red dirt road that runs parallel to Albany hwy. Then go down that until it's T junction, then walk for 50m until the bibbulmun track marker and then just follow the markers from there and you'll be all g.
Chelle Fisher

Reviewed 7 Jun 2022, 8:37pm

One of my favourite hikes in the Darling Range.
Brett Peters

Reviewed 16 Sep 2019, 10:23pm

This is a long hike, and the mid section is rather dull, the reward comes after you pass the over night camp area. As you ascend you can see the scenery becoming rather spectacular. This section is a real work out, so take you time, your reward is the summit. Beautiful rock formations and amazing views. Do go past the high point a bit further, and be rewarded with excellent views. It's a pity this walk is so long, near on 20 kms is a solid hike, explains probably why not many people go here. Next time I might take a tent and overnight it.
Fayley Arthur

Reviewed 17 Feb 2019, 5:43pm

If long views and nice rock formations are your thing then you will enjoy this. The bushland doesn't have any old growth left due to controlled burns and a corresponding scarcity of wildlife so that is a bit disappointing .
Andrea Bertram

Reviewed 19 Dec 2017, 8:20pm

This hike took us about 4.5 hours to complete including a 30 minute lunch stop. Nice views of surrounding bushland and plenty of interesting rock formations. Definitely recommend!

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