Other reasons I have avoided relays and mud runs.
1. Fear of injury. I have heard several stories of extremity fractures in mud runs. A fracture could undo a year of training.
2. Matching goals and passion. I am not sure if I could find a good team match. I am pretty focused on time and not sure I would fit well with a relay team that wanted to interrupt beer drinking to go for 4 to 6 mile runs. On a related note I don't want to push my race goals and performance expectations on others.
3. Expense. My budget can only handle about one destination marathon per year. I am not sure I have the room for a relay. For non"A" races my needs are pretty simple - good course, accurate timing, and good support. A t-shirt, fancy obstacles, live music, and a big party are not high on my list of race needs.
4. Logistics. An ideal race is to easily drive and park at the start area. Warm-up for a few minutes, stroll to the start line, and run. Relays span multiple days and parking and travel details seem a bit more than I am ready to take on.
How about you? Do the benefits of relays and mud runs outweigh my concerns?