GRINNELL – The annual Prairie Burn 100 gravel bike ride and 5K fun run fundraiser will be held on Saturday, June 10th. Registration is now open for the June Prairie Burn 100, the primary fundraiser for the non-profit Imagine Grinnell, a group that supports environmental, sustainability, and health initiatives in the community. For more information on the gravel ride, fun run, activities, and the Prairie Burn group overall, visit prairieburn100.com.