Charity event?

Been thinking about signing up for an event of some kind. Just a random thought that comes to me sporadically.
Today I saw a think about the cancer research "race for life" events, so had a look to see if there was anything relevant to me, distance and time wise.
Well, there is what's called a "pretty muddy" 5K obstacle run at the end of july, not too far away. I could probably cycle there. Well, I know I could.
All mud, climbing over things, crawling through things, sliding down things, lol.
So it sounds crazy, but I bet it would be a blast!
And for a great cause. Would just need to make the decision now, so I can try get sponsorship.
I did the normal 4K walk/jog/run event a couple of times several years ago. First year was before my fitness/weight loss journey started, second was quite a way into it. I'm not a runner, I felt the same both times, haha. But it was great to finish, and the sense of doing something good was wonderful.
Anyway, so yes....I'm considering it.