Ian Fitz who occasionally posts on here has a Salsa Spearfish which is FS, but short travel (80mm I think).
As Scotroutes notes, it’s the gap when the suspension is fully compressed that’s important. Depending on how tall or short you are this might be problematic.
If you are doing some events (which implies the “R” word) then you aren’t likely to be taking large amounts of kit. The lightest, most compact kit is that which you don’t take – it also happens to be free! Kit you do take will depend on the conditions and how you cope with those conditions. Worth a whole new thread, but worth trawling through the threads on the BearBones forums as well as the reviews section on that site.