The ornamental design for a portion of a snowboard, as shown and described.
FIG. 1 is a perspective view of a portion of a snowboard showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a cross section thereof taken along line 3--3 of FIG. 2;
FIG. 4 is a cross section thereof taken along line 4--4 of FIG. 2;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a side elevational view thereof with the other side being a mirror image.
The uneven broken line showing of the remainder of the snowboard is for illustrative purposes only and forms no part of the claimed design.