This information on the Karl Stirner Arts Trail’s accessibility is provided by alltrails.com:
There is at least one designated accessible space in the paved parking lot off North 13th Street at the west end of the trail. It is van-accessible with striped access aisles. The trail surface is paved asphalt or a wooden bridge with railings. It is typically at least 8 feet wide. The whole trail is estimated to be in the mostly gentle (5% or less) grade category. This trail will likely be navigable for most wheelchairs/mobility equipment or stroller users.