Join us for Rock & Rails: Niwot’s free summer concert series! Every Thursday night in 2018 from 5-9pm, June through August at Whistle Stop Park in Niwot Colorado 5:00 – 6:00 : Happy Hour in the park, with drink specials and Opening Music. 6:30 – 8:45 : The evening’s headlining band plays with one break in the middle.