I ran a partial (4 of 12 km) trail (see Strava) in 23℃ (73 F) in 1 hour and 3½ minutes. It felt good and could mean a 4:09 hours marathon result in optimal conditions. I have still 5 months and a lot of training to go to possibly beat my marathon PR from 2004 (3:45 hours) 🏃

runners on a trail next to a canal