Mid-Maryland Ultra Marathon 50k and 5 Person Relay (5 10k loops)-trail run at Rockburn Branch Park (off of Montgomery Rd) in Elkridge, MD. Tame trail run, good for beginners or someone looking to run a fast 50k. $31.07 or $1 a mile for the ultra and $100 for the 5 person relay. T-shirts to all and a long sleeve t-shirt to the ultra runners that complete the 50k.

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