Greeley’s annual Arts Picnic celebrates 39 years of summertime fun Saturday, July 29, from 9 a.m. to 5 p.m. and Sunday, July 30 from 10 a.m. to 4 p.m. Considered one of Northern Colorado’s best arts, crafts & music festivals, the Arts Picnic draws more than 20,000 people to Greeley’s historic Lincoln Park each year. …