The OES visited Hayden Falls on June 8, 2004. The falls are located off Hayden Run Road just west of Griggs Dam in northwest Columbus and are part of the Griggs Reservoir Park. The beautiful Hayden Falls were one of the city's best kept secrets since many people would not expect such a site in an urbanized area. The pool beneath the falls make a terrific swimming hole as evidenced by several people swimming there during our first visit. The swimmers told us that some people jump from the top of the falls into the water, but we do not recommend this as there have been several severe injuries as a result. There was only a small pull-off parking area on Hayden Run Road and an unimproved trail down a steep hill on our first visit, but the city has since installed a nice wooden stairway, boardwalk, and a paved parking lot. The city also installed two overlook areas above the falls. Even with the improvements, the ravine is still impassible at times after heavy rain. The falls are often reduced to a small trickle during summer dry spells. Hayden Falls has a height of about 25 feet with a crest of around 10 feet. With all of the city's improvements at the site, it has become a popular destination for Columbus area residents.