Pretty sure there is a nice easy 4x4 track at the southern end, winds along the river for a while
before heading up hill and out again.
It has a gate there now and will be closed indefinite,Now lets say that gate was not there (in my opinion it shouldnt) you used to go to Angusvale to the Slalem Rapids,Half way along this track on the left is another track called Rock Track i think about 200 metres long if that to the river crossing to Hortons on the other side,which then joins Calvi Track on the Calvi Hill,Like Gippsurfer mentioned, (beware of this crossing its dangerous,plenty of people hav come undone here including myself,I went across two weeks after flooding,i did not know this till i got home and looked on the internet,i've crossed this river a few times but it was just a bit full and the current was a bit/lot stronger and just around stomach height and i am about 5"7 lol,The Hilux began to float about 3/4 across and spun me around and i floated down the river backwards and caught up half way on a rocky river bank and gully to my luck,My friend winched me out in his 80 series,still floated down when crossing the gully till the winch took up.
If you continue on you stop at a small camp area you cannot go any further than this,unless you want to walk the walking track (The Mitchell River Walking Track follows the west bank of the river downstream from Angusvale through the gorge to the Den of Nargun. This is a two-day walk of 17 km. Half way through the gorge is Billy Goat Bend with a spectacular, semi-circular cliff known as the Amphitheatre)
Parks Victoria: Mitchell River National Park page ,To leave on the right is Angusvale Track which in turn comes to a T intersection,Go left and it takes you to the Amphitheater (which is worth checking out,small creek crossing on the way and shaley rocky areas),Go right it takes you back to Mitchell River Access Road,Then if you turn left your back to Dargo/Bairnsdale rd or left back to Angusvale..
Goodluck