Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
Northeast of Novigrad Geralt stumbled across a small camp of Ofieri travelers. Geralt struck up a conversation with one of their number and the topic of discussion turned to horses. Before he knew it, he'd agreed to a race to test whose mare was the swiftest. Had he been to eager in his boasting? Could Roach really go neck and neck with a fabled Ofieri steed? Time would soon tell!
