This is definitely a Relay marathon, unless you're feeling like superman/woman then you can take it all by yourself. The atmosphere is great and people cheer for you. The weather is always super cold so be prepared. It is called Massacre for a reason.
Would not recommend this for a solo. Best to do the Relay marathon. It is not a mostly flat course as it is in the description. Please note this is rolling hills, 15 laps.
By Dbs about 2014
The race is best run in with a 4 person team. The first person has to run 2.2 miles then the following laps are all 1.6 miles. The course is rolling hills so it will test your fitness. The hard part of the relay is the wait between runs, you have to stay loose. The music is good, the teams are yelling and the weather is usually a challenge. I love it