We started at Ottawa Metro Park. The trail at that end is in great condition (except that the loop around the reservoir is not paved, nor even gravel). The bridges are awesome. The underpass at I-75 was closed for road construction. For a few blocks the trail is also a sidewalk in a residential area - watch out for cars and kids on bikes pulling in and out of driveways. The loop around the lovely lake at Schoonover Park is only paved part way around. The other part is coarse gravel. Fine for a mountain bike, but we were riding recumbent trikes. Along the river the trail is nice, however, it smelled of sewage in many places. We turned around when we got to the refinery. On Google Earth it appears that the trail parallels the refinery for about a mile. Overall the section we rode was a great workout - lots of twists and turns, ups and downs. Very few road crossings due to the street underpasses at the bridges. Though there were plenty of expensive looking granite trail markers, none of them indicated mileage, which would have been helpful.