Every Memorial Day, over 47,000 runners, joggers, and walkers add another chapter to BOLDERBoulder history. For a select group, their performance also earns them a place among the fastest ever for their age.
Following the 2026 race, 219 performances have been added to the BOLDERBoulder’s all-time Single Age Top-20 lists, including ten new No. 1 performances.
The lists rank the 20 fastest BOLDERBoulder performances at each individual age and offer a unique look at nearly five decades of racing in Boulder. The lists can be viewed here.
Since the inaugural race in 1979, BOLDERBoulder has now been staged 46 times, with 1,547,740 people crossing the finish line. And among all those finishes is something believed to be unique in road racing: BOLDERBoulder is thought to be the only road race in the United States, and possibly the world, that maintains historical all-time Top-20 lists for every single age.
Ten New Single-Age Records
The 2026 race produced 10 performances that climbed all the way to the top of their respective age lists:
- Chris Grauch (age 53 Men) – 34:52
- Frank Zoldak (age 59 Men) – 35:34
- Kristine Clark (age 63 Women) – 42:10
- Jack Pottle (age 71 Men) – 43:07
- Steve Bell (age 76 Men) – 51:04
- Gary Ostwald (age 80 Men) – 48:29
- William Repphun (age 82 Men) – 58:30
- Dennis Muirhead (age 85 Men) – 1:00:38
- Constance Ahrnsbrak (age 86 Women) – 1:18:17
- Jesse Aweida (age 95 Men) – 2:07:24
Several of the 2026 record setters are no strangers to the top of the lists. Zoldak, Clark, Muirhead, Ahrnsbrak, Aweida each moved up an age and established another No. 1 performance after doing the same in 2025.
The Names That Keep Showing Up
Making one Single-Age Top-20 list is an accomplishment. Appearing year after year, and decade after decade, tells another story entirely. Dave Dooley continues to lead all athletes with 31 appearances across the lists. Doug Bell ranks second with 26, followed by Libby James with 22, Constance Ahrnsbrak with 21, Don Larson with 20 and Laura Bruess with 19.
Those totals illustrate one of the most interesting aspects of the Single-Age Top-20 lists: they reward not only speed, but longevity.
Decades of Excellence
Few athletes demonstrate that longevity better than Ellen Hart. Hart owns the widest career footprint of any person on the lists, spanning 44 years from her first appearance in 1981 at age 23 through her most recent in 2025 at age 67.
On the men’s side, Verne Carlson span is 34 years running from 1983 at age 50 through 2017 at age 84.
Who Owns the Most No. 1 Rankings?
Doug Bell remains the king of the men’s Single-Age lists with eleven No. 1 rankings. He is followed by Jose Cardenas with seven, Jesse Aweida with six, and Ray Schramm with five On the women’s side, Libby James leads the way with ten No. 1 rankings, followed by Ellen Hart with six and Colleen De Reuck with four.
Records That Have Survived More Than Four Decades
With thousands of runners challenging the lists each Memorial Day, two records have survived since 1981. Mark Scrutton ran 29:38 at age 20 in 1981, a performance that remains the oldest standing men’s single-age record. That same year, Ellen Hart clocked 34:53 at age 23. More than four decades later, it remains the oldest standing women’s single-age record.
219 New Pieces of BOLDERBoulder History
The 2026 race added 219 performances to the all-time Single-Age Top-20 lists, surpassing the 204 additions from 2025.
Behind every one of those entries is a different story – a young runner beginning a racing journey, an athlete hitting a new level in mid-career, or a longtime BOLDERBoulder participant proving that fast running doesn’t come with an expiration date.
Together, the Single-Age Top-20 lists provide a nearly five-decade snapshot of BOLDERBoulder history, connecting generations of runners through one simple question – How fast can you run BOLDERBoulder at your age?