At the 2017 World Championships in Lahti, Finland, Musgrave scored the best ever result for a British Nordic skier when he finished fourth in the Men's 50 kilometre freestyle, following an 11th place in the 30 kilometre skiathlon and a 12th in the 15 kilometre classic earlier in the championships. On 16 December 2017, in a 15 kilometre World Cup competition in Toblach, Italy, Musgrave finished in third place.