Hi Al and Bruce
I have not been up Coomera Gorge from the Gwongoorool Pool, which is down on the Coomera River to the west of Binna Burra, however, the way up the gorge is to rock hop south from the pool. I believe there is another way into the gorge that is off the Coomera circuit, south of Binna Burra, though I do not know it. Some here might, but from all accounts it is off track and quite steep.
I have been to the Gwongoorool Pool and completed the Illinbah Circuit, which is approximately 16 km in length, and starts just near the National Parks ranger station at Binna Burra. I recommend the circuit, though anyone traversing the Coomera River needs to make sure it has not rained heavily in the previous days (there is rain forecast for the end of this week). The Illinbah Circuit crosses the river 12 times and is one of the few tracks I have taken longer than the recommended walking time to complete. It is very photogenic though.
If it has been wet in the lead up to the walk, there are many options for day hikes in Lamington, and most will please if you are after spectacular rainforest and waterfalls. From Binna Burra there is the Coomera Circuit, which could also be flooded after rain, as it traverses up the top end of the gorge. I like the Ships Stern circuit too, for the variety of vegetation and views. Of course there are more tracks from O’Reilly’s, and if you are wanting pictures of the prettiest waterfalls, you must go out to the Box Forest Circuit to Elabana Falls and up Tooloona Creek to the Border Track.
There are many options. I recommend getting a copy of “Take a walk in South East Queensland” by John and Lyn Daly (
http://www.takeawalk.com.au/). I have misplaced my copy at the moment so I can’t tell you if they have a description of the walk into Coomera Gorge, but I think there might be some track notes on rock hopping up the gorge. Perhaps someone else has their copy handy and can tell you.
Anyhow, any walk up in the McPherson Ranges (Border Ranges) will not disappoint.
Have a good and safe walk!
Cheers, Andrew
Edit -> I have found my copy of Take a walk in SEQ and there are track notes for walking into Coomera Gorge on pages 189 & 190.