This map shows the 26.2 mile route that runners in the March 7 Fidelity Investments The Woodlands Marathon will follow. <PERSON>, the traffic coordination for The Fidelity Investments The Woodlands Marathon said the main road closures and detours begin at 6:45 a.m. and continue until roughly 1:30 p.m. There are an estimated 8,000 registered participants in the 2020 event, she added, which follows the same route as in 2017, 2018 and 2019. Photo: Image Courtesy Fidelity Investments The Woodlands Marathon / Image Courtesy Fidelity Investments The Woodlands Marathon