running 3:10:00 
About 18 miles inc. walking part. Started at the chubb trail, lone elk trail head. wasn't sure whether i would do an out-and-back or try the Big Loop, actually neither seemed very plausible given how run down and sore i felt. decided to run to other end of Chubb trail and see how i felt. Had a camelbak with lots of pockets, but as it turned out didn't have enough in the pockets.
By the time I got there i had already decided that the out and back would be boring and that I should do the Loop since i had never done it before. Therefore continued on the park raod and took a right into rte 66 park, crosssing the Meramec River. Ran along 44 roughly to cross the first set of tracks, and then the second set of tracks. It was not particularly pleasant to run along the highway. At the trailer park my directions said 'pick up the service road here', but i didnt see a service road so i just ran into the woods, along a stream bed and then veered left to pick up the 'service road', which was a pretty faint single track at that point. I was now running north again, as i would have been had i turned back on Chubb.
The track became more distinct, but then became confused, and i must hav taken a wrong turn because after a while i was in the flats at the big bend in the river, and i had to meander back and forth, fording several deep creek gullies to finally pick up the track again. I would not want to mountain bike this route as some have described doing, until the trail became more established.
When I did get back on the track, it finally did almost look like it might have been a service road, running straight along the steep bluffs by the river. It ended at a washed out bridge, and became a circumvential trail through several gullies. I could see the buildings at the Al foster trailhead that i recognized from the aerial photo fragment i had brought along, so i headed there...I noticed that i was out of water! It had gotten to about 60 degrees as promised (56, to be exact). I went into a restroom shack in the complex of buildings, and there was actually a kind 'engineer' associated w/ the narrow guage railroad who let me refill from his grimy bathroom sink. I shudder to think what would have happened to me without this water.
Then head back east on the Al Foster trail along the river. Somewhere beyond 2:30 into the run, I started running 4 minutes, walking 1. I was hurting. I had no 'food' left: all i had brought were 2 small bottles of chocolate soy milk. At 3:10, I just started walking, but I was almost at the ford at the gravelbars. Starting across, the water hit my legs like snake venom. Yes, it might have been 60 air temp., but the water had ice floating in it! I felt faint, and for a brief moment wondered how far the strong current would carry me if i fell over. The water was higher than the last ford, up to the lower hip. Legs were bright red exiting the water. Stupid rain jacket in pack didnt seem so stupid anymore. Started walking....
walking 45:00 
took a bearing at the river's edge for a direct line to the culvert under the railroad, and started walking through the woods. Saw a deer, said hi, but a moment later wondered how good that deer would have tasted. Missed the culvert by a bit to the right, so just climbed embankment over tracks, hit Chubb trail, climbed trail up hill, put on more clothes (started running in t-shirt and shorts, but wind had picked up and it was cooler) and gulped down some food left in the big pack. Unlocked bike and rode park road, to 141 park n'ride bus stop.