Tips & Resources for Hiking the First and Second Flatirons : TIP: This hike gets really crowded, so start early (before 8:30 AM). TIP: Take a lunch or breakfast and coffee with you. The first flatiron nooks are perfect for just sitting and enjoying a picnic. TIP: Weather can come up fast on the flatirons in the summer. Just be aware that it can change fast and bring a rain jacket.