The aim of this study is to examine the available scientific evidence on the reliability and criterion validity of 6-minute run walk field-based test when administered to children and adolescents. Systematic searches were performed in three electronic databases (MEDLINE/PubMed, SPORTDiscuss and Scopus) from their inception until February 2024, with an update on August 15, 2024. Studies were considered eligible if they provided information on the criterion-related validity and/or reliability of the 6-minute run walk test when conducted by children (aged 12 years and under) and/or adolescents (aged 13 to 17 years). To examine reliability and validity, two separate meta-analyses were implemented. In the meta-analysis focused on criterion-related validity, the five studies included indicated a fair validity (r = 0.56 [95% CI: 0.44-0.66]) and high homogeneity (I2 0%). In the meta-analysis focused on reliability, the pooled data from the five studies employing Pearson's correlation coefficient (n = 585) revealed strong reliability values (r = 0.82 [95% CI: 0.75-0.87]), albeit with a moderate level of heterogeneity (I[superscript 2] 71% prediction interval 0.55-0.94). The evidence suggests that the 6-minute run walk field-based test demonstrated fair criterion-related validity and strong test-retest reliability when conducted with children and adolescent.