John Carlson Flanders

John Carlson Flanders, devoted husband, father, grandfather, attorney, coach, and proud lifelong resident of Longmont, passed away Saturday surrounded by his family, the steady center of his life, in the community that shaped him.

More than any professional achievement or civic role, John’s greatest pride and deepest joy was his family. He loved his wife, Laurie, with a devotion that anchored their home through every season. He found his greatest happiness in being Dad and Poppy, whether around the dinner table, in long unhurried conversations on hikes or chairlifts, or on the sidelines cheering with unmistakable pride. His strength was quiet and unshakable, his humor dry and perfectly timed. His presence made everything feel steadier, safer, and whole.

Born to Laurence and Eleanor Flanders, John graduated from Longmont High School in 1963, a class he insisted was the finest in school history. A gifted athlete, he was a four-sport athlete at Longmont High School and continued his athletic pursuits in college, competing in both basketball and track at Stanford University. He earned his bachelor’s degree from Stanford in 1967 and his Juris Doctor from the University of Colorado School of Law in 1970.

Even as a young man, John carried a deep sense of justice. In the summer of 1963, he participated in voter registration efforts during the Civil Rights Movement, working to expand voting access in the South. In 1968, he interned with the civil rights law firm Hill, Tucker, and Marsh in Richmond, Virginia, researching and drafting briefs for federal cases. Those experiences shaped him, but they did not redirect him. He could have built a career anywhere. Instead, he chose to come home. Longmont was not simply where he lived. It was part of who he was.

In 1970, John joined the family law firm that would become Flanders, Elsberg, Herber and Dunn, LLC, continuing a legal legacy begun by his great-grandfather in 1871. For fifty years he practiced with humility, integrity, and steady judgment, focusing on estate planning, trusts and estates, real estate, business law, and probate. He was respected not for volume or visibility, but for wisdom.

His commitment to Longmont extended far beyond his practice. He served in leadership roles with the Longmont United Hospital Foundation, Rotary, the Chamber of Commerce, local banking institutions, the YMCA, and numerous other civic and charitable organizations. He was also instrumental in helping shape the community’s parks and open space, working with the City of Longmont to help plan and establish Flanders Park, named in honor of his great-grandfather, Fred W. Flanders, who served as mayor and helped oust the KKK from city government in 1927. John also worked with Boulder County to help preserve open space surrounding the western and northwestern portions of McIntosh Lake so that future generations could enjoy the land he loved. In many ways, his work reflected a century-long Flanders family tradition of civic stewardship in Longmont.

He was equally present in the rhythms of daily life. A familiar face in the crowd, he followed his children and grandchildren in all they pursued across the country, from Colorado to Indiana to North Carolina and beyond. He hiked and skied Colorado’s mountains with his daughters, golfed with lifelong friends, traveled widely with his family and his Gold Key companions, and studied history and classical music with a curiosity he later passed on to his grandchildren. And though he saw much of the world, his loyalty never wavered, most visibly expressed in his steadfast commitment to Colorado’s own Coors Light. It was never about taste. It was about loyalty.

Beyond his family, coaching basketball was his great passion. For decades he poured into young athletes, shaping not just teams but character. He coached his daughters, his son, his daughter-in-law, and later his grandsons, a three-generation investment from the same sideline. His mantra, “Run, gun, and have fun,” captured his belief that the game should build discipline, resilience, and joy. And while patient in most things, he had little tolerance for stalling at the end of games. If you were going to compete, you were going to compete boldly.

Even in his final season, weakened by chemotherapy, his love for the game never faded. He still found his way to the gym to watch his beloved Longmont Trojans, proudly cheering on his grandson and several of the same boys he had once coached. As always, he stood at the east end of the floor, too nervous to sit, living every possession with them. In that familiar place, he remained what he had always been: a coach, a mentor, and a grandfather who showed up.

One of the defining moments of John’s life came after a Rotary meeting when dear friends asked whether he wanted to accept Jesus Christ as his Lord and Savior. When he said yes, his life changed in steady and profound ways. His faith became the quiet foundation beneath everything else, shaping the husband, father, grandfather, friend, and leader he became. His faith, and the dear friends who met him every Friday for Bible study, anchored him through illness and gave him peace that could not be shaken.

John is survived by his beloved wife, Laurie, whose love shone brightest during the darkest days of his cancer treatment; his siblings Laurel Umile, Lynette Moyer, and Paul Flanders (Dianne), all of Longmont; his children Carolyn Flanders Martens (Rob) of Carmel, Indiana, Sarah Flanders Davis (Gregg) of Fishers, Indiana, and Laura Flanders Wilson (Dug) of Raleigh, North Carolina, and their mother, Helen Driver of Raleigh, North Carolina; Katie Schell Gaddis (Chris) of Longmont and Phil Schell (Sara) of Longmont; and his fourteen grandchildren, Aiden Gaddis (Jenna), Gray Martens, Laura Martens, Cole Gaddis, Jane Martens, Cameron Wilson, James Wilson, Ty Gaddis, Griffin Gaddis, Londyn Schell, Eleanor Davis, Stella Schell, Cael Davis, and Everly Schell.

Though he held many titles—attorney, coach, mentor, and civic leader—those who knew him best would say his greatest gift was his steady presence. John believed that a meaningful life was built quietly, through faith, family, friendship, and service to one’s community. In the end, the measure of his life can be seen in the generations he guided, the community he helped shape, and the countless lives made better simply because he was there.

A celebration of life will be held at LifeBridge Christian Church on Monday, April 20 at 10 am. In lieu of flowers, John would invite his friends to honor him by practicing small acts of generosity: hold the door for someone, tip the waitstaff generously, lend a hand where it is needed, encourage a young person, or simply do something kind for someone else. He believed the best communities are built through everyday kindness, and there is no better way to remember him than by passing that generosity forward.

Fond memories and expressions of sympathy may be shared at www.howemortuary.com with his loving family.