[Your letterhead, if desired; if not, your return address]

[Date of letter-month, day, and year]

[Recipient's first and last names]
[Company name]
[Street or P.O. box address]
[City, State ZIP code]

Dear [recipient's name]:

Put on your running shoes and mittens, and get ready for the always-entertaining annual 5K run for Thanksgiving! For our annual event this year, we will hold the run at Century Park on Saturday, November 22nd at 9 a.m. (Rain/snow date: November 29th at 9 a.m.)

In keeping with our annual tradition, there will be special kids' activities and a tots' walk/jog, plus door prizes and awards for the most creative holiday-themed outfits.

You do not want to miss this 5K run, so mark it on your calendar now. See you there!

Sincerely,

 

[Signature]

[Sender's first and last names]