Omanawanui Track is a hiking area in Mangatangi, Franklin, holding a 4.8 rating from visitors.
It's worth being realistic about fitness level before setting out on a longer bush track like this, since underestimating a walk's difficulty is one of the more common ways a good day turns into a hard one, particularly if there's real elevation gain involved. Carrying enough water and a snack matters more on tracks without facilities partway through, and checking whether dogs are permitted is worth doing in advance, since rules vary between reserves and conservation land even within the same district. Regulars tend to check recent track reports before heading out, since native bush tracks can be affected by fallen trees or slips after storms that aren't always signposted at the trailhead.
For those in the Mangatangi area up for a proper walk, Omanawanui Track is well worth the effort.