Take off from Manapouri head down the south arm...theres a long valley running south with the Hunter mountains on the left (beautiful in winter) keep going....soon you get a view of green lake just ahead and left, your now approching a saddle straight ahead, pull up and over and there's lake Monowai in front of you.
Depending on what your ride is will determine how you approch the next bit, the lake curves away to the left and its quite a hard pull around to stay off the hillside and still keep low. I did it in an F4, and came over the saddle at about 400kts 200ft agl, and that resulted in a 4+g turn to stay where i wanted to be......good for the circulation
follow the lake to the end, pass between black mount on your right and mount titiroa on the left.....again, depending on your speed, you pick up the Waiau river ahead....keep the mountains on the left, pull around freestone and your back at Manapouri 
..........and if your still comfortable, pull up vertical roll over , nose down in the dust and do it in reverse.....as in course not flying backwards....although if you have a chopper you could try. 
This is what VLC is made for.....sorry its not the same without pictures, but I'll do them later.
VLC and and suitable cloud .. SUPERB ! 
great shots....Im glad you enjoyed it. I'll be doing it again later today, and might explore a little more of the area.