The start of this ride is also part of the Manawatū Cycleway on The Country Road. The views are spectacular, and there are plenty of good spots to stop off at along the way to soak in the vistas.
Starting from Mangaweka Campgrounds, cross the Mangaweka Bridge over the Rangitīkei River and continue south on Ruahine Road for 17km, before turning right onto Rangiwahia Road.
1.5km down this road you'll find the settlement of Rangiwahia. There are toilets here, and a campground (but no shops).
Continue through Rangiwahia, and at the historic Pemberton corner, turn right onto Mangamako Road.
From here the route is primarily a descent towards Sandon Block Road, which is to your right at the end of Mangamako Road. Sandon Block Road is gravel, and winds its way up and down through farmland with bush views of the Rangitikei River in the distance.
At the end of this road, you'll reach State Highway 54 on Cheltenham - Hunterville Road. Turn right, and you'll come to the entrance of Vinegar Hill Domain, marking the end of the trail. The domain is a beautiful place to take a swim, and camp out for the night.
The Ruahine Dress Circle Scenic Reserve is a must-do, and is located on Lagoon Road (gravel road), which is off Kelpie Road. It's great for a quick swim!