In 1974 The NATC joined forces with the AMA and put together a nine-round series as the US National Trials Championship.

In second place was up and coming star Marland Whaley on the Montesa with early series leader Don Sweet bringing his Yamaha home in third.

Factory Honda rider Marland Whaley stomped all over the championship in 1977 taking eight wins from eight starts, leaving the rest to fight it out for second spot.

That battle was won by Bernie Schreiber who tied with Don Sweet for second but took the nod on highest place finishes throughout the season.

[2] The 1978 Championship was a three way battle between defending champion Marland Whaley, 1974 Champion Lane Leavitt and Bernie Schreiber who was splitting his time between the nationals and the FIM Trial World Championship for the first time.