Design Cisco L2 network with redundancy help?

Hi Everybody,

I’m currently working on an upcoming project. The project has to do with building a L2 based network. There will be created some physical loops between access sites and 2 main site. Each acess site will have 1 connection for each main site. The 2 main sites will be connected with each other Thus creating several logical rings.

My question is that what would be the best solution to stay safe from loops? Is spanning tree enough for this project? I was thinking of using MST and creating several regions.

Any advice or reference would be helpful.

Thanks in advance