On-course race leader Emmanuel “Natos” Corvera (20km) approaches end of first lap. He started fast, went faster, then gradually slowed back to his start pace.
Walkers stream by multiple lap scoring officials, who record assigned athlete on each lap as s/he passes by. Most walkers would finish before noon but a few will go beyond that. There is no natural shade, just a few canopies for race officials. Note lack of spectators.