Well at this point I am very familiar with the Platte river Mup during the day time and have ridden it a few times after dark w/o lights (I dont normaly ride at night). During the few times I did ride at night it was around 10pm and there were still some other cyclists around, but at 2am I doubt that would be the case, but if I was going to be out commuting at that hour I would have a good light or two. Now for the Sand Creek trail, I am much less familiar with that. I have only ridden it about 3 times and all were in the day. The Sand Creek trail seems much more secluded and with much less traffic even during the day.