TNF Endurance Challenge Series, Washington DC

TNF Endurance Challenge Series, Washington DC

BREAKING NEWS UPDATE: ONE DAY ONLY (valid from April 21st at 12:01AM until April 22nd at 12:01AM) 40% OFF DISCOUNT for ALL RACES at #ECSDC. AFTERPARTY DETAILS BELOW. When we say “Endurance Challenge Series” it’s a lot like grassroots, free fitness.