As World War II took members away from the Black Hawk Motorcycle Club, meetings fizzled out and activities were canceled, but the post-war era brought new life to the club. As the men returned home, friendships from the club awaited. The Black Hawk club grew to over one hundred members as the weekly meetings resumed at Tibbits’ shop and racers grew anxious to hit the tracks. The uniform changed to black Western-style shirts with no emblem, for a clean-cut look, and activities were attended once again.

     Not all the club’s activities involved motorcycling, but the majority did. Holiday runs became popular in the late 1940s and early 1950s. Riding the weeks after Thanksgiving and Easter were often chilly, but always fun. Tickets were hidden along a route prepared by one member with directions to the next stop. As the years passed, the hiding places were better and their finding more difficult, as riders walked through ditches, water, and woods for the next set of instructions and the next destination. The women prepared a dinner with all of the trimmings for the end of the ride. Christmas and New Year's called for parties, of course, as did Halloween, complete with costumes. The Black Hawk club also hosted box socials, a popular mixer in the late 1940s. Decorated boxes filled with meals prepared by the women were auctioned off. The highest bidder got the meal and the woman who made the lunch. Field event days included potato sack races, beanbag tossing, and many laughs. Gypsy tours were held throughout the Midwest as clubs gathered from miles around to ride, camp, party, and enjoy one another’s company for a long weekend each summer. The Tall Corn Derby Run was also popular with the Black Hawk Motorcycle Club. This was a run where participants rode their bikes all night long while stopping at checkpoints along the way. The winner received a traveling trophy of a giant piece of corn for their effort.

     Racing remained the most popular activity for the club. They sponsored hillclimbs in Vinton and Denver Hills, outside of Denver, Iowa, as well as scrambles in Newton and short-track races at Tunis Speedway in Waterloo. Some event-winners could take home $150 in cash awards. Over $600 in prize money was awarded at Tunis Speedway in races sponsored by the Black Hawk Motorcycle Club in 1948. This was a large amount considering a new WR racing model Harley-Davidson could be purchased new for $750 in the late 1940s. These bikes were stripped versions of the WLA, the war model used by the U.S. military in World War II.

The popularity of motorcycling in the early 1950s contributed to the growth of the Black Hawk Motorcycle Club as well as other clubs in the area, including the Dunkerton Dukes and the Allison Tigers. For the most part, clubs remained friendly toward one another. The non-riding public respected the activities of motorcycle clubs in these early years. The outlaw image of the drinking, drug-using, criminal bikers had not yet been formed and motorcycling was seen as just an inexpensive way of travel.

     Despite the growing popularity of motorcycling in general, the Black Hawk Motorcycle Club was coming to an end. With the death of Lloyd Tibbits, owner of the shop, club members began to go their separate ways, start families, and move to various parts of the country. As this was occurring, a new motorcycle club was being formed in Waterloo.