Leonard Guerue, Sr was born on January 18, 1936 to Peter and Evelyn (Eastman) Guerue in Rosebud, SD in a tent and was taken to the Rosebud IHS Hospital. Leonard attended St Francis through 5th grade and then finished at Todd County. Leonard enlisted in the Army in 1953 during the Korean War and was stationed in England. He was honorably discharged on June 5, 1956. After his military service, he enrolled at Teacher College in Springfield, SD and gained a degree in auto body. Leonard married the love of his life, Irene Richards on January 7, 1953 and they remained married for 72 years. The marriage brought 2 sons into the world Leonard, Jr (BoyBoy) and David Wayne. The couple have 3 grandchildren; Josh, Mike and Melissa; 6 great grandchildren; Kiley, Nathan, Ilicia, Isaiah, Joshua and Jackson; and 1 great-great grandchild, Melissa.

Leonard worked with his brother Ted in Scottsbluff, NE and in Colorado Springs, CO and then in Denver, CO for 37 years. Leonard worked in the auto body business for 45 years and retired in 1962. The couple moved back to Mission, SD in 2004, and Leonard lived out the remainder of his life there. Anyone who has spent any time around Leonard could not help but love this man and his incredible chuckle and humor. Leonard enjoyed bowling, dancing, entertaining family, church and participating in military activities.

Leonard was preceded in death by his sons Leonard Jr and David; parents Peter and Evelyn; and his four siblings Theodore, Donald, Belva & Floyd.

Funeral arrangements have been entrusted to Holmes Funeral Home of Valentine, NE. Wake will begin on Thursday, April 24 with an 11:00am caravan from the casino, proceeding to Fr. Paul Hall in Mission. Evening services will begin at 7:30 pm followed by military final roll call at 9:00 pm. Funeral mass service will be at 10:30am Friday, April 25, 2025. Interment with full military honors will immediately follow at the Sicangu Akicita Owicahe Tribal Veteran Cemetery north of Mission, SD.