Motionsports

All of the secret rings are golden, floating orbs which open out into rings making a sound as they do so. You should see them fairly well and if not, the sound will indicate you being near to one.

To note, the paths for getting Diamond on the levels may vary as this is a guide for getting to the secret rings easily rather than for getting Diamond on the challenge.

1 - Leaving the Nest - Stay high over the arch for the first one and then glide to the left of the next thermal through two stone structures aiming for the thermal in front of the high cliff face with the two stone structures on top. The other two rings are atop this so use the thermal to get as high as possible and glide through the two in succession.

2 - As the Crow Flies - For this one, you should aim for the first blue ring and then onto the second one lower down. Then, head towards the third blue ring but instead of going through it, take a right towards a thermal. Once inside the thermal get as high as you can and do a U-turn. You will see a secret atop a building. Head through it slightly moving to the left and you will see the second. As you go through the second, the third will be clearly visible lower down in a gap between a couple of buildings right next to where you got your second blue ring.

3 - Rising High - Go through the first 6 blue rings as normal but when you get to the seventh you want to go through and be heading towards the left. As soon as you are through, take a sharp lefthand turn all the way back on yourself staying at the same height to go through the first secret ring. You will then see the second ahead and to your left. Go through that heading down below the highway and stay low to the left of the building where you will see the third. Going to the right after this gets you to a thermal to get you back up high and on course again by spinning back around on yourself once you have reached maximum height.

4 - The Stone Labyrinth - Go through the first 8 blue rings in order. Then where you would normally dive down to the ninth, head over to the right where there are a couple of arches in the distance. The furthest one has the first secret ring. You should be turning to your right when going through this and looking to head down for the next one. Head into the thermal and gather speed towards the next thermal. This next one is the hardest. Make sure to rise right to the very top of the thermal and stay steady so you can glide slightly around the rock on your right and straight towards the final secret ring. Then take the thermal back out of the caves.

5 - Summer Skyline - This set of rings is right near the start. Head through the first blue ring and the first secret ring is in between the two buildings on your left in a very narrow gap and fairly low down. To get into this gap without crashing, I moved to the right after going through the first blue ring and then lifted myself up and to the left to slow down and line up the path. Then after going through the first secret ring, you will see the second ahead. Dive down into it and pull up and into the thermal. Whilst rising in the thermal turn 90 degrees to the left and make sure you level out as soon as you hit the top of the thermal so as not to lose speed. Keep bringing yourself around to the left and you will see the third secret ring. The path then continues on as normal.

6 - Cave Gliding - For this set, you need to go through the first 13 blue rings as normal. After getting the thirteenth head over to the thermal on the right rather than down into the caverns. Get some height off the thermal and head to the left side of the ridge where you will see the first secret ring. Keep following it round for the second and third secret rings and then you can carry back on where you left off with the blue rings.

7 - Rendezvous Point - For this course, you need to pass through the first 7 blue rings. Once you have passed through the seventh one, head to the left instead of the right towards the eighth blue ring. Head between the two buildings and you will notice the first secret ring low between two buildings. You will pass through a thermal along the way which will try to push you up so keep pointing downwards. You then need to head out towards the sea and left underneath the big suspension bridge for the second ring. Now head straight into the thermal and get as much as height as you can, level out and turn towards the left. You will see the last secret ring ahead between two buildings. You can then take the thermal up and head around the left side of the building to get back on track.

8 - Freedom - There are no secret rings on this course.

The achievement popped for me as soon as I got the last ring in game.