of traversing ski slopes cross country trails and other winter recreational snow surfaces as shown in fig1 the tongue and hitch assembly 14 is connected to the tow bar 30 of the towing vehicle not shown by a suitable pin or fastening connection 32 as is well known in the art the roller assembly 16 includes a rear elongated frame 36 which is also of generally c shaped configuration when viewed from the top as illustrated in fig2 the rear frame 36 is of tubular construction and includes a pair of laterally spaced apart tubular side elements 38 having the rearward ends thereof connected by a laterally extending tubular back cross support 40 as shown in fig2 the side elements 38 are welded to the back cross support 40 and are located outboard of the side members 22 of the front frame 20 shown in fig2 the front frame 20 and the rear frame 36 are pivotally connected by a first pivot means 42 the pivots 42 may be in the form of suitable anchor pins or fastening elements which extend through the forward end of the side elements 38 and an intermediate portion of the corresponding side member 22 as best shown in fig2 such pivots 42 permit the scraper and snow collector assembly 18 to have a raised position and a lowered position where the collector is in close proximity to the grade or terrain as shown in fig1 and as will subsequently be described mounted at the rear of the front frame 20 is a scraper blade support mounting element 44 which extends parallel to the front cross brace 24 at the back of the front frame 20 the mounting element 44 abuts and.