Actually, you can. By going on the ship at port Sarim that is heading for Karamja (30 coins needed), you may enter the volcano and pass the secret entrance. Climb up the rope and you will see yourself in Crandor once again!
For help in the Dragonslayer Quest:
http://gameolosophy.com/games/online/runescape/how-to-do-runescape-dragon-slayer-quest
tyjurdhj
Most dragons are for paying members. The only dragon is the one for the quest Dragon Slayer. In the quest 'Dragon slayer' you have to kill a dragon named elvarg and after you have completed this quest your a ble to go back to crandor and battle elvarg as many times as you wish
I think that it is possible to reach Crandor island via a route that requires you to go under the volcano in Karamja. This route is much more dangerous than the normal route, as there are lesser demons that walk around the area. I am not sure whether this route can be accessed without completing Dragon Slayer. However, you can still try. If you are a low level then for your first time attempting the route, I recommend you leave all but 3 items in your bank so you do not lose anything in case you die.
You need to have completed the quest: Dragon Slayer, from this quest you will gain access to the wall, the wall leads to the volcano where you fought Elvarg, from there you can go up a rope to the island of Crandor.
well first you have tostart the quest dragon slayer so be a decent level if you want to fight a dragon in the quest you have to rebuild a boat which takes you to crandor but is destroyed on the shore. theres also another way to get to it im not sure if it counts before you crash the boat but just take a ferry ride to karajama from port sarim once on the island go into the volcanoe found at the end of the island. when inside it has a direct link to crandor so if you keep going right past the lesser demons you will see the dragon. remember bring your anti dragon breath shield lots of food prefer swordfish for me and some str potions also using prayer can also be useful. hope this helps
Besides going for the Dragon Slayer quest which you take a boat there, you can go by Karamja. Set sail from Port Sarim [the people will charge you 30gp] then go to the volcano [see map]. Gotta be careful coz there are stuff like skeletons and lesser demons D: I'm not too sure about the rest, but just keep walking, and go up a rope or something and eventually you will find yourself in Crandor ;D Hope this helps :)
Go to below link and go to non-member quest and find dragon slayer quest. It is a good guide with screenshots.
you have to go to dragonstone.
Providing that you have done all you need to do on the Dragon Slayer quest, youwill go onyour boatand it sails you to Crandor, you have to go up to the top of the volcano (There is Hill Giants and Lesser's) you have to follow a path in the volcano and elvarg will appear. Jump over the ledge and battle her.
go to runehq.com they have everything you will need for runescape
Go to Dragesvard and start the quest 'Train Dragon Slayer'. Once you finish the quest you will have to roll a dice. Getting over 70 will give you a scale. Give it to Galaoth and he will give you dragon slayer armor. This will allow you to learn dragon moves which will make you better at dragon slayer missions.
you can buy a dragon blade at valencias shop. you have to go to dragon slayer lair then quest for the dragon blade or get lucky when you hunt for monsters