RUBY CRYSTAL
Go directly south from the hideout until you reach the map's edge. Behind some trees is this treasure.
T-REX SKULL
You need the Archer Costume for this treasure. Head east from your hideout until you see a small waterfall. Near there is a rope you can climb to some platforms above. On the other side of this area up here is a barrel of arrows. Shoot and use the two rope arrows to get to the door with the treasure behind it.
GRIZZ'S LAIR KEY
You will need the Sabretooth and Thief Costumes for this treasure. East of your hideout is a bridge, close to the waterfall from the previous treasure. Look underneath the bridge to find a dummy for your Sabretooth Costume, so drop down. Use the costume to get to the next dummy. Here, you need to stand on the switch, then use the Thief Costume's Slow Time ability to jump across the spire jumps and get through the door in time. The treasure is behind the door.
SPIKED CLUB
You will need both the Archer and Samurai Costumes for this treasure. Cross the bridge from the previous treasure, then go west and right before the geyser ahead is an opening that leads to some volcanic area. You're in the right spot when you see the barrel of arrows. Cross two rope arrows, then deflect the fireball back at the door to open it and reveal the treasure.
SLYTANKHAMEN'S VASE
Look to the north of your hideout to see a large skeleton dinosaur with its head upside down. There's a geyser nearby that you can use to get up to the platform with it, then you'll need to bounce off the mushroom nearby and try to land a spire jump on its bones. From there, it's a clear shot to the treasure. Note that you can Paraglide back to the hideout by using the geyser.
MONA LITA
In the north section of the map, there is a tunnel with a lot of guards inside. You know you're in the right one when you see the Sanzaru Games logo. The treasure is in the cave, out in the open.
LUTRELA NIVADENSIS
You will need the Jailbird Costume for this treasure. In the same tunnel as the previous treasure, there is a path that is filled with molten rock. You need to stand on the ball and roll over the hot rock, then hit the door with the ball to open it and reveal the treasure.
GRIZZ'S SKATES
You need both the Jailbird and Sabretooth Costumes for this treasure. Near the western entrance of the tunnel for the previous two treasures, there's a cracked ice wall that can be broken using the Jailbird Costume's ball and chain. Do that and then use the Sabretooth Costume to get from dummy to dummy. The treasure is behind the ancestor door.
SABRETOOTH SKULL
On the west side of the map, find the giant statue of The Grizz made out of ice. From here, go north and then do a 180 and go south down the ramp. At the bottom, go north again and follow the ledge on the right, past the mushroom and rope, until you spot the treasure around the corner.
CAVE PAINTING
North of your hideout is an ice bridge. Go to the south end of it and right before you start to cross it, drop down the ledge right to your left. You should land next to a crate, and the treasure is right next to it.
STONE WHEEL
Find The Grizz's area in the southwest corner of the map. From here, locate the wooden bridge above you that is to the northeast a little bit. Get on this bridge and as you cross it west, you'll see this treasure sitting between two big rocks.
DINO EGG
Go back to the same area as the previous treasure. As you across the bridge away from where the previous treasure was, you will see a dinosaur with a catapult for its tail. Use it and as soon as you lift off, deploy your Paraglider. You might need to use it again, but you should see the treasure on a ledge just over the wooden wall.