sentences:  The 2019 Skyrunner® World Series season runs from April to October.It consists of 15 races in 11 countries and concludes with the "SkyMasters", the end of season race open only to qualified athletes.Athletes are ranked on their top 4 points results of the season, of which no more than 2 can be "SuperSky Races" - races rewarding twice as many points as a Sky Race, plus the SkyMasters points.