FIG. 1 is a perspective view from the front, right corner of the cover for a snowmobile trailer or similar article, showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left-side elevation view thereof, the right side being the same;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left-side elevation view thereof, open from the rear;

FIG. 8 is a left-side elevation view thereof, open from the front;

The broken lines in the drawing are for illustrative purposes only and form no part of the design claimed.