To get to Fossil Island, you need to complete the Bone Voyage quest and earn 100 kudos at the Varrock Museum.
Once you meet these requirements, you can access several transportation methods to reach the island. The fastest way to reach Fossil Island is by using a digsite pendant.
I recommend charging multiple pendants at the strange machine in the House on the Hill to unlock the direct "Fossil Island" teleport option.
This teleport takes you to the Museum Camp, where most island activities begin. You can buy OSRS gold to purchase pendants from the Grand Exchange if needed.
Taking the boat from the Digsite is another reliable method. After completing Bone Voyage, speak to the Junior Navigator at the barge to start your journey.
The boat remains a consistent way to reach the island, especially for new players. For efficient travel around Fossil Island, use the Magic Mushtree network.
To unlock this system, visit each mushtree location and interact with them. The network connects key areas like the Museum Camp, Mushroom Forest, and House on the Hill.
The transportation method you choose depends on your activity. For birdhouse runs, use the digsite pendant to reach the Museum Camp, then take the mushtrees to access your birdhouse locations.
For general exploration or skill training, the boat from the Digsite provides a straightforward route to begin your adventure.
Remember to keep a digsite pendant charged for quick returns to the mainland. This guarantees you can efficiently travel between Fossil Island and other key locations in OSRS.