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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.
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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.