The aim of the study is to determine the intensity of exercise during amateur running competitions taking place in the Sudeten Mountains, based on results of measurements of energy expenditure. The study covered those participating in 2015-17 and included details on themselves and their preparation. Their energy consumption was measured using a CALTRACTM device. Routes are described by distance (km) and altitude (m). Average energy output values for 19.2 km and 613.8 m were calculated from measurements taken which was characterized as ‘unduly heavy’. In women this value was 11.6 kcal/1 min/55 kg and in men - 12.7 kcal/1 min/65 kg.