To start the Footrace mini-game, talk to Konba at the Footrace Check-In (north of Tabantha Bridge Stable).
The goal in this mini-game is to reach the finish point marked by flags at the top of a nearby mountain. The route you’ll take to reach the top depends on you, but for this mini-game, you cannot call your horse.
To beat Konba, you would either have to take shortcuts while he is walking on the main route or you could even use Revali’s Gale and jump off from a vantage point to reach the top of the mountain.
If you finish this mini-game, Konba will reward you with a Silver Rupee.