Boston’s Museum of Science will host its first Sci-K fun run along the Charles River esplanade on October 6, to benefit the museum.  Check-in will be at 8AM, with start time at 9AM and at 11AM awards ceremony, food and beverages, and science activities (see Facebook page). It’s a dog-friendly, stroller-friendly, untimed run. Registration is $35 for adults, $18 for kids under 13.