Blenheim....
I moved from Blen down to CHCH 3 years ago...
Still have a house up there.. will be back in about 4 years...
Theres some good rides up there & the Molesworth & Rainbow
hydro road loop is a 400k round trip from Blen..90% gravel...
Will be closed on the last day of Easter for the winter snow...
Mt Richmond forset park with access to Mt Patriarch....
Find by going up the north bank of the waiau river , first side rd
on yer right after yer leave the seal and onto the gravel....
Heres a couple links "if you don't already know about them" that could intest you for Rides..
Has most of the rides though out the south island....
http://www.remotemoto.com/
Blenheim group of ADV rides.....
http://advrider.com/index.php?thread....973206/unread
Kiwi biker fourm...
http://www.kiwibiker.co.nz/forums/content.php
Pete