Thirroul Hollow Multi-Cache
tiddalik: That should have been an archive note!
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Difficulty:
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Terrain:
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Size: 
(small)
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This multi is a challenge with a mountain bike and a good circuit walk for those on foot. There are paths all the way; you just have to choose the right one.
Wp1 will take you to a sign on which is the name of a famous English born Australian. You will need to do some research on this person to move onto Wp2 and then GZ.
To find Wp2, Firstly take the age of the person when they arrived in Australia and multiply this by the number of white topped steps where you stand and add 34 to give you
S 34 18._ _ _
Take the common 4 letter word in this persons 3 developmental concepts and add all these letters of the word together where A=2.5 B=3.5 ... Z=27.5 to give you
E 150 55.0 _ _
Once at Wp2 you will need to look for Caesars favourite number. Multiply that by the number of gates you passed on your journey and then add 492 to give you
S 34 18._ _ _
Take the number of feet associated with 12/11/1894 related to this person and add that to the year of death, then subtract 1562 to give you
E 150 55._ _ _
The mountain bike track down to Gz is back down the way you came. When at the intersection a third of the way down, take the left path ( facing ocean ) then take the small track to your right. The track has some nice flowing sections as well as some rocky technical sections but average riders will have no trouble as the drops and jumps are mostly avoidable!
Once at Gz it is just off the track where the English born Australian would look...
Make sure you bring your bikes and Have fun!
Additional Hints
(Decrypt)
Gur crefba lbh jvyy or erfrnepuvat vf Ynjerapr Unetenir
naq gurer vf zber guna bar tngr