As you drive through Cambridge township on SH1, before going up the hill past the golf course turn right over the low level bridge, travel up through Shakespeare Street, and turn left into Browning Street at the sign to Karapiro Water Sports.
As you leave the built up area of Leamington, Browning Street becomes Maungatautari Road and Sarnia Park is 1.51 km along on the left - just past Redoubt Road which turns off to the right.
Turn left off SH1 at the Lake Karapiro sign, cross the dam and turn right, travel approximately 4km and Sarnia Park is on the right at 151 Maungatautari Road. If you pass Redoubt Road on your left you have gone a little too far.
Turn right off the Te Awamutu/Cambridge Road into Lamb Street, this road goes to Karapiro Lake and joins Maungatautari Road. Sarnia Park is on the left at 151 Maungatautari Road.