If you want a sparrow race, here's the place to plan it. Use VoG from the beginning before the spire rises, hop on your sparrow and race around the jungles of Venus against you and 5 other guardians.
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No sparrow races until you complete the qualification round. Make it to templar on a sparrow= beginner Make it to gatekeeper= good Make it to atheon= pro Atheon dead still on sparrow= master