Front portion of all terrain vehicle

FIG. 1 is a perspective view of the front portion of an all terrain vehicle of the present design application;

FIG. 2 shows a left side view of the front portion shown in FIG. 1 ;

FIG. 3 shows a right side view of the front portion shown in FIG. 1 ;

FIG. 4 shows a top view of the front portion shown in FIG. 1 ; and,

FIG. 5 shows a front view of the front portion shown in FIG. 1 .

The broken lines showing environment or structure are for illustrative purposes only and form no part of the claimed design. Other views of the front portion of an all terrain vehicle are not part of the ornamental design claimed and are therefore not shown.