These are the tubes that run from the nest to the identified food source.

Before landing, the crew misinterpreted the runway markings, and the pilot flying (PF) perceived the runway side stripe marking indicating the left edge of the runway as the runway centreline.

Runway 06L markings at Montréal/St-Hubert Airport 4 days after the occurrence (Source: Google Earth)

After the inaugural race, organizers improved the marking of the trail for the first contest held in the Whitehorse–Fairbanks direction.