Getting there

Rainbow Beach is 240km north of Brisbane or about 3 hours drive. The northern entrance of the Cooloola Great Walk is at the Carlo Sandblow carpark approximately 1.5km from the Rainbow Beach central business district.

Assuming you've either gotten here doing the walk from the other end of day 1 via Rainbow Beach start at the campground at Freshwater.

Maps

https://parks.des.qld.gov.au/__data/assets/pdf_file/0019/164206/cooloola-gw-topo.pdf 

Route/Trail notes

Starting at the Freshwater camp - 600 metres to the beach.

Walk up the beach towards the lighthouse for just under 7km until you see the sign for Leisha track. This is shared with 4WDs

Walk about 1/2 way along this track until you see the road split in two. On the left is is a marker for the walkers.  You've gone too far if you hit the big green sign that says 10.7k to Rainbow Beach township.

Walk about 6 k along this track (very few markers and none with text). You will hit very close point to Freshwater Road and here you see the first sign with text that will say Calo Sandblow 3.6k.

Follow this and you will then hit the sign that is the fork to Poona Lake. Go right to head towards Carlo Sandblow. You will hit the sign at the bottom of the hill that says 600m to Carlo Sandblow or 1.1k to the Info Centre. If heading back over the sandblow - go right and up the hill. You'll hit the sandblow - go across that and follow the track to the beginning/end of the Great Walk.

Permits/Costs

Assuming you stayted at Freshwater Campground ~$6