No need to trek to Denver from the outer reaches of Boulder County to view the amazing works that can be created with chalk as the medium and concrete as the canvas. The centerpiece of the Longmont Chalk Art Street Fair on Saturday, September 30 and Sunday, October 1, 10 a.m. to 6 p.m. both days, is when you can watch 25 artists on their hands and knees gracing downtown Longmont with colorful chalk art. The event provides a venue for artists to create, vendors to show their wares and visitors to enjoy live art, live music and opportunities to visit local artisan vendors. 600 Block of Longs Peak Ave., Longmont.