Another Rotorua rider, Daniel Self finished third at the weekend, four seconds behind Hamilton.
In the women's race, Rotorua-based Australian rider Ronja Hill-Wright was the rider to beat going into the event. However, she had to settle for second after young rider Rawson (Papamoa) took out the race in 2m 11s, four seconds ahead of Hill-Wright.
"Shania is a young up-and-comer, she is only 17," Ashmore said. "Ronja was definitely the one to beat but the conditions changed throughout the race run."
He said plenty of rain on Saturday afternoon meant each rider could only have one race run. It was originally planned to have two race runs each, with the best time counting. Hamilton and Rawson both collected $500 for winning the event.
The Hukkit Sick Trick title, which included a $100 reward, was won by local rider Nathan Saunders who works at Skyline. He won the best trick award following a no-hander.
The Mountain Bike Rotorua Fundy Hundy title, for the best rider weighing over 100kg, went to Matt Tew. Ashmore thanked all their sponsors for their help.
Results:
Men: 1 Louis Hamilton (Rotorua) 1m 57s, 2 Keegan Wright (Rotorua) 1m 59s, 3 Daniel Self (Rotorua) 2m 01s.
Women: 1 Shania Rawson (Papamoa) 2m 11s, 2 Ronja Hill-Wright (Rotorua) 2m 15s, 3 Cati Pearson (Rotorua) 2m 26s.