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| Length | 10.356 miles |
| Other names | E 7th St No 16 1/2 Rd Walker Rd Hillbrand Rd |
| Start | Manton, JCT BUS US-131 View Larger Map |
| End | Lake City, Missaukee County, JCT M66 View Larger Map |
| Municipalities traversed (W to E) |  Manton Caldwell Lake City |
| Road intersections |   ==(1 mile concurrency) || ||\ EXIT 191 (end BUS US-131 concurrency) ||/ || ==  == |
| Notes | M42 used to continue west to Mesick, but was truncated in 2007. That section is labeled as Old M42. |