 | ||||
|---|---|---|---|---|
 M621 highlighted in blue | ||||
| Route information | ||||
| Maintained by National Highways | ||||
| Length | 7.7 mi (12.4 km) | |||
| Existed | 1972–present | |||
| History | Constructed 1972–75 | |||
| Major junctions | ||||
| West end | Gildersome | |||
 M62 motorway  M1 motorway | ||||
| East end | Rothwell | |||
| Location | ||||
| Country | United Kingdom | |||
| Primary destinations | Leeds | |||
| Road network | ||||
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The M621 is a 7.7-mile-long (12 km) loop of motorway in West Yorkshire, England that takes traffic into central Leeds between the M1 and M62 motorways.