Monster Dash 5K Run/Walk

The 2026 Monster Dash is hosted by the Platteville Community Arboretum! This is a family-friendly event that includes runners and walkers of all abilities. A fun time for all! It's mid-October and costumes are encouraged to be worn. Halloween-themed prizes, shirts and swag for all participants! The entire run/walk will be on the Rountree Branch Trail! The race will begin at 10 AM on the south side of Valley Road (near the Fish Garden on the trail) with parking available in the City Garage’s parking lot (890 Valley Road). For registration the day of, look for the registration tent starting at 9 AM. T-Shirt Note: All registrations received by October 4th are guaranteed a T-shirt. NOTE: Online registration ENDS at 11:59 PM on Thursday, October 15th. After that, you can register in-person (by cash or VENMO) for $30 the day of the event starting at 9 AM on Saturday, October 17th.