Longest Glow-in-the-Dark Trail in Iowa and U.S. Just 30 Minutes From Cedar RapidsLongest Glow-in-the-Dark Trail in Iowa and U.S. Just 30 Minutes From Cedar RapidsWalking and biking trails don't really get much use after dark. But, that may no longer be the case for a new "glowing" trail in eastern Iowa.DanielleDanielle