Creekside trails are considered flow trails.  One big climb to the top and then a fun downhill to the bottom.  Repeat as necessary.  Naturally, trails are one way.  Located next to the singletrack is Creekside Cyclocross course.  The cyclocross course is 2.6 miles.

Flow Trail Article from the Press-Citizen – https://www.press-citizen.com/story/news/2020/10/16/iowa-mountain-biking-coralville-opens-flow-trail-bikers/3665325001/