Loveland has four natural areas along the Big Thompson River as it flows through the town. One of which is the Old St. Louis Natural Area.
I think what put this 37-acre natural area on my radar is when word went out that they'd closed off the Madison Avenue entry to it. I hadn't really heard of it until then. So, when word went out recently how they'd opened that entry again, I went to check it out.
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The entry off of Madison, south of SE 4th Street near Marisol Assisted Living, winds down to the official trail; this seems easier than parking off of Lincoln at the 'official' trailhead.