[Radek]

There is a clearing near the half way of the river between the lake and the "upper lake". The raptor is there.

Notes:
1. There are two eggs available. One is dropped by the raptor, one is lying on the ground.
2. The raptor is spawned only if you have the quest. Every time you get the ranger quest, a new raptor will be spawned.
3. The egg survives reset advantures.
4. Any egg of a raptor will do. You can collect some in Brimloch Roon, inherit them from game to game and make the rangers quest really easy.

Therefore, embark on your raft and travel to the clearing.