It is totally situational depending on the job you are applying for and the amount of experience you already have.
Very general rule - fundraising ok to include, marathon not so much.
Both are extra activities and with enough work experience, you shouldnt need to list them. If you dont have a lot of experience, the fundraising can double as work experience, but the marathon cannot (even if it takes the same qualities to run a marathon as it would to accomplish a work-related task). Just because you have demonstrated certain qualities elsewhere does not mean they should be listed on your resume. However, if running the marathon is somehow relevant to the future position, definitely include it.
I personally come from a business industry perspective, so if your industry isnt quite as cut-and-dry, it may be ok to include it. Also, if it comes up in the interview (as in, you notice a picture of FutureBoss crossing the finish line - I wouldnt try to work it in), it will make a good conversation piece and demonstrate those qualities as an extra bonus.