Awesome run down the Grand Canyon. 7.5 miles down to the Colorado River and 7.5 miles back up to the rim, mostly steps. Snow and ice on the first and last mile. Elevation loss of 4460' going down, and 4460' gain on the return.
It only rained a little in the beginning but the trail was extremely muddy. Running on muddy trails in the dark is always a challenge. Despite the condition of the trail I was able to set a PR for a 50k at 5:26:28. This was only my 2nd 50k and I hope to do better in the future.