Benaquahallie, at 494m in height, is designated as a Marilyn. The walk up the hill is not too challenging, but the lack of any clear path means that some decent footwear is advised. Can be boggy in places.
From wikipedia: A Marilyn is a mountain or hill in the UK, Republic of Ireland or Isle of Man with a prominence of at least 150 metres (492 ft), regardless of absolute height or other merit. The name was coined as a punning contrast to the designation Munro, used of a Scottish mountain with a height of more than 3,000 feet (914.4 m), which is homophonous with (Marilyn) Monroe.
Up the top of the hill, other than some great views, there is a trig point close to the highest point. Slightly downhill, to the east, is a unique built up cairn.
Cairn on Benaquhallie.
There are no signposted trails to the top of Benaquhallie, so have a look at a map and choose your approach. There are also a few walk reports on various hillwalking websites that detail some routes. However, here's some suggestions:
The route I took, starts from a small, disused quarry on the south of the B9119. From there, cross the road and initially follow a muddy track through a gate into a field. Walk up the western edge of the field (it only takes a few minutes to cross), go through the gate at the top of field and follow a fence right the way up to the trig point at the top. You'll pick up a boggy land rover track shortly after leaving the field. Please note that the field may occasionally be home to some cattle (if this is the case, it may be possible to cut across the neighbouring field if you're not comfortable walking in same field as cows, but you may need to jump a fence to re-join the path).
I parked at the disused quarry, but have heard recently that this gate is now locked, so that is no longer an option. There may be alternative spots nearby on the verge near there.
However, the likely best option for parking is at Upper Dagie (see attached co-ords) and there is a straightforward route through some farmland, more or less straight up the the Cairn (which should be clearly visible if the weather is on your side). You'll likely need to stomp across some heather to get to GZ.
Another option could be to take a longer walk from Corrennie forest, across Green Hill, but this may be quite a long walk through some pretty boggy ground and dense woodland. I haven't walked through that way myself, so not sure how easy or difficult it would be, but I have read a user report on the walk highlands website; seems quite a slog.
Or just turn up and follow the arrow on your GPS.
View from half way up on a dreich November day.
Above all, enjoy the walk, and I hope you get some better views than I did on the day I placed the cache.