Activities whose tracks are close to 21. Compared with 1307 of 1307 other activities so far.
2017-11-18 10:29 p50: 4 m
2017-05-16 15:57 p50: 4 m
2016-12-11 13:02 p50: 44 m
2016-12-04 12:20 p50: 76 m
2016-11-27 12:25 p50: 136 m