| v 35 | ons 1/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | |  |
| IFK Lidingös öppna KM MTBO-2021 | IFK Lidingö SOK | Stockholm | M | när | | M | | |  |
| MTBO/TrailO-träning | Skogslöparna | Ångermanland | LM | klubb | | M | | | |
| tor 2/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| fre 3/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| lör 4/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| sön 5/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| MTBO, DM, medel, Ångermanland | Härnösands OK | Ångermanland | M | mäst | | M | | | |
| v 36 | mån 6/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| tis 7/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| ons 8/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| tor 9/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| fre 10/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| lör 11/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| sön 12/9 | MTB OL | Gotlands Bro OK | Gotland | M | vb | | L | | | |
| v 37 | mån 13/9 | MTBO-KM OK Kåre och Domnarvets GoIF | OK Kåre | Dalarna | M | klubb | | M | | | |
| tis 14/9 | Östgötaserien MTBO, #5 | Linköpings OK | Östergötland | M | när | | M | | | |
| ons 15/9 | MtbO 6 2021 | Visborgs OK | Gotland | M | när | | L | | | |
| MTBO SM-banor | OK Nolaskogsarna | Ångermanland | M | klubb | | M | | | |
| tor 16/9 | | | | | | | | | | |
| fre 17/9 | | | | | | | | | | |
| lör 18/9 | MTBO, DM, medel, Värmland | OK Fryksdalen | Värmland | LM | mäst | | M | | | |
| Smålandscupen MTBO | Markaryds FK
Tockarps IK | Småland
Skåne | LM | dist | | M | | | |
| MTBO 2021 Kvarnsveden | Kvarnsvedens GOIF OK | Dalarna | M | dist | | M | | | |
| sön 19/9 | Göteborg Multisportrace | Mölndal Outdoor IF | Göteborg | LM | klubb | P | L | | | |
| MTBO, Domnarvets GoIF, lång | Domnarvets GOIF | Dalarna | M | dist | | L | | | |
| v 38 | mån 20/9 | | | | | | | | | | |
| tis 21/9 | | | | | | | | | | |
| ons 22/9 | BJÄSTANATTA | Skogslöparna | Ångermanland | LM | när | | M | N | | |
| tor 23/9 | | | | | | | | | | |
| fre 24/9 | | | | | | | | | | |
| lör 25/9 | MTBO, Svenska Cupen, #6, sprint | Surahammars SOK | Västmanland | M | nat | | S | | | |
| sön 26/9 | MTBO, Svenska Cupen, #7, medeldistans, final | Surahammars SOK | Västmanland | M | nat | | M | | | |
| v 39 | mån 27/9 | | | | | | | | | | |
| tis 28/9 | | | | | | | | | | |
| ons 29/9 | | | | | | | | | | |
| tor 30/9 | | | | | | | | | | |
