West Marin ranchers had high hopes when they joined a collaborative effort to open a mobile slaughterhouse, giving them control over a key link in the region’s farm-to-table food chain. But less than two years after it opened, their Marin-based facility has closed.

The enterprise succumbed to management woes, worker shortages and supply-chain bottlenecks. But its members are taking solace from the fact that their efforts called attention to the need for a local slaughterhouse—and…