Improved boot bindings for backcountry splitboarding are disclosed. Each of a pair of soft-boot bindings has an integral boot binding lower that conjoins the two halves of a splitboard without the additional weight or height of an adaptor mounting plate and extra fasteners. Attached to the integral boot binding lower are the elements of a boot binding upper. The integral boot binding lower, in combination with upper boot bindings, provides improved torsional stiffness for splitboard riding. The integral boot binding lower further includes a toe pivot for free heel ski touring. The boot bindings can be readily detached from the ski touring position and reattached to the snowboard riding position, or vice versa, as is advantageous in backcountry touring and riding.