Within the coming years, the gathering would become a farmer's fair known as the Great Grangers’ Picnic Exhibition, which brought in upwards of 100,000 guests from more than 30 states over its week-long stay.

In 1937, Emmett Shelle convinced him to construct Williams Grove Speedway, a half-mile sprint car racing track, next to the park.

In the 1960s, the park was a popular country music venue, featuring well-known acts such as Dolly Parton and Johnny Cash.

Hughes relocated several rides to Williams Grove from multiple locations, including the defunct New Jersey Palisades Amusement Park, which closed in 1971.

Hughes had not prepared for high water levels, and in June of 1972, shortly after its refurbishment, Williams Grove Amusement Park was nearly destroyed due to Hurricane Agnes and subsequent flooding from nearby Yellow Breeches Creek.

Ownership attempted to rebuild what was lost, and the park operated through the end of the 2005 season when the Hughes family decided to focus their attention on the Williams Grove Speedway instead.

[6] On January 19, 2007, the nonprofit Williams Grove Historical Steam Engine Association purchased the southern 90 acres attached to the park, which they had utilized since the 1950s, for $2.25 million.

This event, called "Terror in the Park", took guests on a guided walk through the dimly lit grounds, passing various scare actors.

[9] As of 2024, The Williams Grove Historical Steam Engine Association is raising money to move the old carousel building from the park to their adjacent grounds.

Cyclone was well-known for the several issues that plagued its operation, including being damaged by fire in late 1995, and the station and a portion of track collapsing under the weight of snow early the next year, the latter of which resulted in $500,000 in repairs.