Mark Twain National Forest is so expansive, at more than 1.5 million acres, that we could probably spend our entire lives exploring and not see it all. However, there are quite a few hidden gems tucked within the forest that we definitely want to try to see. Greer Spring Trail, for example, will lead you through old growth forest and to Missouri’s second-largest spring.

Have you ever followed Greer Spring Trail to the second largest spring in Missouri? Share your experience in the comments! Once you’ve visited Greer Spring, consider planning a visit to Blue Spring, the eighth largest spring in Missouri. (You have to see the absolutely gorgeous blue color of the spring.)

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