The ornamental design for a narrow wheeltrackutilitytrailer, as shown.
FIG. 1 is a perspective view of a narrow wheel track utility trailer
showing our new design, the hitch portion is shown broken away for
convenience of illustration;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof; and,