He was a lifelong resident of Elgin and created several works honoring the city's history. Several of his sculptures are displayed at the Elgin Area Historical Society Museum. His public sculptures include the Pioneer Family Memorial on the east bank of the Fox River and a bust of James Talcott Gifford (1800–1850), founder of Elgin.[4]
In 1936, the commemorative Elgin Centennial half dollar designed by Rovelstad was issued by the United States Mint. Commemorating the centennial of Elgin, Illinois, the obverse features the profile of a pioneer with the dates "1673 * 1936," while the reverse features a pioneer family (four adults and a baby in its mother's arms). The coin was issued to finance the construction of Trygve Rovelstad's Pioneer Family Memorial.[5][6]