Geographical Olympiads are disciplinary competitions that can be a tool for assessing geographical knowledge and skills in different countries of the world. This article aims to analyse the results of the national and international geography Olympiads and to identify their conditionality and interrelationship. The secondary aim is to find out whether the Czech Geography Olympiad (GO) selects contestants who can succeed in the International Geography Olympiad (iGeo). The fulfilment of these two aims can be an incentive for other national geography competitions to reflect and discuss on their structure in relation to iGeo. To achieve the aims, data from the national and international geography Olympiad from 2015 to 2022 were analysed quantitatively. The results indicate that the iGeo has a higher internal consistency and correlation among its parts than the GO, which tests some knowledge and skills that are not required in the iGeo. The results show that the concept of assessment is somewhat different in the two monitored competitions, which may mean a less than ideal selection of contestants for the international round of the competition.