Kristi is the daughter of Dean and Joyce Mason, of Boardman, Ore. Nicholas is the son of Jeff and Julie Letsche, of Marcus.
Providing music for the wedding ceremony were pianist MaryAnn Ruden and soloists, Megan Skeffington and Alissa Brady.
Maid of honor was Britt Carlson, of Cherokee. Bridesmaids were Jillian Letsche and Chelsea Mason, both of Marcus, and Julie Mason of Ventura, Calif.
Flowergirls were Maria and Emma Rosener and Kirsten and Kaelee Letsche.
Ben Letsche, of St. Paul, Minn., brother of the bridegroom, was best man. Groomsmen were Joe Brady and Jeremy Letsche of Marcus, Kyle Johnson of Manson, and Baden Letsche of Marcus.
Seating the wedding guests were David Rupp, Chris Reuter, Jeff Dunn and Pat Mohning.
The reception was held at the Marcus Community Center immediately following the ceremony.
Kristi is a graduate of Riverside High School in Boardman, Ore. She earned her bachelor of science degree at Oregon State University and her doctor of veterinary medicine degree from Iowa State University. She is employed as a veterinarian at Marcus-Remsen Veterinary Clinic.
Nicholas is a graduate of Marcus-Meriden-Cleghorn High School. He earned his bachelor of science degree in agricultural studies from Iowa State University. He is employed as an agronomist with the FCA Office in Cleghorn.
The couple is at home in Cleghorn.