RMI guide Simon Kearns has etched his name into the annals of Mount Rainier’s storied history, achieving a new Fastest Known Time (FKT) for an on-foot car-to-car ascent and descent of the iconic peak. His remarkable feat, completed in a blistering 3 hours, 43 minutes, and 50 seconds, saw him reach the 14,410-foot summit in an equally astonishing 2 hours and 34 minutes. This record-setting performance emerged not from an initial plan, but from a dramatic pivot; Kearns had originally aimed for the ski record this spring, but a lean snow year coupled with the catastrophic failure of a snapped race ski necessitated a change of strategy. Instead of conceding defeat, Kearns swiftly transitioned his focus, lacing up his running shoes and targeting the on-foot FKT, ultimately delivering a legendary performance that underscores both his athletic prowess and adaptive spirit.
Mount Rainier: A Beacon for High-Altitude Ambition
Mount Rainier, an active stratovolcano standing as the highest peak in Washington State and the Cascade Range, presents an formidable challenge for mountaineers worldwide. Its immense glaciated mass and significant prominence of over 13,000 feet make it a demanding objective, attracting thousands of climbers annually. While often perceived as a "walk-up" by some, the mountain’s severe weather patterns, rapidly changing conditions, and complex glacial terrain—riddled with crevasses and requiring technical navigation, particularly through sections like the Disappointment Cleaver—make it a serious alpine undertaking. A typical guided ascent via the standard Disappointment Cleaver route spans two days, involving an overnight stay at Camp Muir (elevation 10,000 feet) to aid acclimatization and allow for an early summit push. The stark contrast between this multi-day effort and Kearns’s sub-four-hour round trip highlights the extreme level of fitness, skill, and acclimatization required for such a speed ascent.
The Rise of Fastest Known Times (FKTs)
The concept of a Fastest Known Time (FKT) has gained significant traction within the ultra-endurance community, representing the ultimate test of speed and endurance on established routes, trails, or mountains. Unlike organized races, FKTs are self-supported endeavors where athletes attempt to set the quickest verifiable time, relying on their own resources and meticulous preparation. Verification typically involves GPS tracking data, photographic evidence, and witness accounts. Mount Rainier has long been a coveted objective for FKT attempts, drawing elite athletes eager to push the boundaries of human performance in the high alpine. Previous notable record holders, such as Alex King and Jack Kuenzle, have set high benchmarks, with Kuenzle’s historic ski record often cited as a pinnacle of integrated speed and technical skill. These records not only showcase individual achievement but also inspire a broader community of adventurers to explore their own limits within the challenging realm of mountain endurance sports.
A Strategic Pivot: From Skis to Speed Running
Kearns’s journey to this FKT was characterized by a crucial shift in strategy. His initial objective for the spring season was to challenge the existing ski record for Mount Rainier, a discipline that combines the grueling uphill ascent with the technical demands and speed of a ski descent. This plan, however, encountered significant obstacles. The Pacific Northwest experienced a notably lean snow year, resulting in suboptimal snowpack conditions that would have compromised the speed and safety of a ski descent. The decisive blow came when a critical piece of equipment—a specialized race ski—snapped, rendering his ski record attempt infeasible.
For an athlete who had dedicated years to preparing for this specific challenge, such setbacks could easily lead to disappointment and abandonment. Yet, Kearns demonstrated remarkable adaptability and mental resilience. Rather than succumbing to the circumstances, he swiftly re-evaluated his options. Recognizing that his peak physical condition and intimate knowledge of the mountain remained intact, he recalibrated his goal, redirecting his formidable training towards an on-foot FKT. This strategic pivot underscores the dynamic nature of alpine pursuits, where success often hinges on the ability to adapt to unforeseen challenges and capitalize on alternative opportunities.
Years of Dedication and Deep Mountain Connection
For Kearns, this FKT was far from an impromptu decision; it was the culmination of a decade-long dream and three years of intense, focused preparation. "The record means a ton to me," Kearns told TGR. "I first started dreaming of going for it over 10 years ago, and over the last three years it became a big focus in my life." This profound, long-standing ambition fueled his rigorous training regimen and meticulous planning.
His professional role as a guide with RMI Expeditions proved to be an invaluable asset. RMI, one of the oldest and most respected mountaineering guide services in the United States, has been leading expeditions on Rainier since 1969. Kearns’s experience guiding clients up and down the mountain provided him with an unparalleled, intimate knowledge of the terrain, optimal routes, prevailing conditions, and the nuances of high-altitude travel. This firsthand understanding of every turn, every crevasse, and every change in snow conditions allowed him to optimize his strategy for speed and efficiency. "I started guiding on Mount Rainier last year which made me even more motivated to go for it as my attachment to the mountain grew," he explained, highlighting how his professional connection deepened his personal commitment to the mountain and its challenges.
Beyond his personal drive, Kearns also credited external support for his success. He received precision coaching from Jay Cole, an expert in ultra-endurance training. This partnership was critical in fine-tuning his physical conditioning, optimizing his pacing strategies, and ensuring he was adequately prepared for the extreme physiological demands of a speed ascent. Speedy mountaineering is a game of fine margins, where every second counts and every ounce of energy must be conserved and efficiently deployed. Cole’s guidance likely focused on maximizing cardiovascular output, building specific strength for steep ascents, and developing mental fortitude for sustained high-intensity effort at altitude.
The Record-Breaking Ascent: A Detailed Chronology
The day of the FKT attempt unfolded with near-perfect conditions, a critical factor for any high-alpine speed record. Kearns commenced his ascent from Paradise, the main visitor center at 5,400 feet, which serves as the trailhead for the most popular climbing routes. His chosen path was the standard Disappointment Cleaver route, renowned for being the most direct and fastest option for FKT attempts, despite its technical challenges.
From Paradise, Kearns ascended rapidly through the lower snowfields, past Panorama Point, and onto the expansive Muir Snowfield. His relentless pace saw him reach Camp Muir at 10,000 feet in an astonishingly short time, a point where most climbers would be settling in for their first night. From Camp Muir, the route becomes more technically demanding, traversing the formidable Ingraham Glacier and then navigating the Disappointment Cleaver itself. This section involves steep snow and ice, often requiring the use of crampons and ice axes, and frequently features fixed lines or ladders to aid passage over challenging rock bands and glacial features. Kearns’s extensive experience as an RMI guide would have been instrumental in efficiently navigating these complex sections, minimizing time lost to route-finding or technical maneuvers.
The favorable mountain conditions played a significant role in his success. Stable snow, clear visibility, and a manageable temperature window allowed for optimal footing and reduced the risks associated with adverse weather. Throughout his ascent, Kearns encountered numerous other mountaineers, many of whom were engaged in multi-day climbs or ski tours. Their presence, far from being a distraction, provided an unexpected source of motivation. "There were lots of people skiing the mountain and it was incredible to get lots of cheers and encouragement along the way," Kearns recounted, highlighting the communal spirit often found in the alpine environment.
He reached the crater rim, just shy of the true summit, in approximately the same time as Jack Kuenzle did during his historic ski record. This comparison is particularly striking, as Kuenzle had the advantage of skis for a potentially faster descent, yet Kearns matched his uphill pace on foot, underscoring his phenomenal cardiovascular output and efficiency. After a brief moment at the summit, Kearns began his equally rapid descent back to Paradise, meticulously retracing his steps. The entire car-to-car journey culminated in his record-shattering time of 3 hours, 43 minutes, and 50 seconds.
Analysis of Performance: Unfathomable Output and Mental Fortitude
Kearns’s FKT is a testament to an extraordinary level of physical conditioning and mental resilience. The comparison of his ascent time to the crater rim with Kuenzle’s ski FKT is particularly telling. While Kuenzle’s record integrated the speed of a ski descent, Kearns achieved a comparable uphill pace without the benefit of a subsequent glide. This indicates a cardiovascular output and lactate threshold management that is almost incomprehensible to the average mountaineer. For context, most experienced climbers require anywhere from 5 to 8 hours to ascend from Camp Muir to the summit, let alone from Paradise. Kearns completed the entire ascent to the summit in just over 2.5 hours, a pace that demands sustained, maximum effort at significant altitude.
His success also highlights the critical interplay of physiological preparation, intimate route knowledge, and optimal conditions. The precise coaching from Jay Cole undoubtedly contributed to a highly optimized training regimen, allowing Kearns to maintain a relentless pace without succumbing to early fatigue or altitude sickness. Furthermore, his years of guiding on Rainier provided him with an instinctive understanding of the mountain’s terrain, enabling him to move with unparalleled efficiency and confidence, minimizing any hesitation or wasted effort. This achievement is a masterclass in focus and execution, where every element—from training to strategy to execution—converged perfectly.
The psychological aspect of such a feat cannot be overstated. Pushing the absolute limits in a high-alpine environment demands immense mental fortitude, the ability to tolerate extreme discomfort, and unwavering focus. After coming agonizingly close in previous seasons, finally breaking through made the accomplishment even sweeter. "After nearly getting the record twice over the last two years it was an unbelievable feeling to get back to Paradise so far under the old time," he shared, reflecting on the satisfaction of a goal realized after persistent effort.
Broader Implications and the Future of Mountain Endurance
Simon Kearns’s FKT on Mount Rainier carries significant implications, both for the individual athlete and the broader community of mountaineering and ultra-endurance sports. His achievement serves as a powerful source of inspiration, demonstrating the extraordinary capabilities of the human body and spirit when confronted with ambitious goals. It pushes the perceived boundaries of what is possible in high-altitude speed attempts, potentially motivating other elite athletes to train harder and innovate new strategies for similar challenges.
For RMI Expeditions, Kearns’s success reinforces the organization’s reputation for expertise and high-level guiding. Having a guide who holds such a prestigious record not only adds to the credibility of their operations but also inspires clients who aspire to similar, albeit less extreme, achievements on the mountain. His intimate knowledge, honed by both guiding and FKT attempts, will undoubtedly benefit his clients. "It’s a day I’ll certainly be thinking about every time I’m on the mountain with clients and friends this summer," Kearns noted, emphasizing the lasting impact of his accomplishment.
However, such high-speed endeavors also subtly underscore the inherent risks of alpine environments. While Kearns’s experience and meticulous preparation mitigated many dangers, the mountains remain unpredictable. FKT attempts, by their very nature, involve pushing limits, which can elevate exposure to hazards like falls, crevasses, and rapidly changing weather. It implicitly highlights the importance of extensive experience, rigorous training, and sound judgment for anyone attempting to move quickly in complex terrain. The broader community often looks to these record-breakers for insights into training methodologies, gear advancements, and mental strategies, fostering a continuous evolution in the sport. Kearns’s FKT is not merely a number; it is a narrative of dedication, adaptability, and the relentless pursuit of excellence in one of nature’s most demanding arenas.
Reflecting on his monumental effort, Kearns succinctly captured the blend of exhaustion and elation common to such achievements: "Super tired, happy and stoked," he shared on Instagram. This record will undoubtedly stand as a beacon for future generations of mountaineers and endurance athletes, symbolizing the relentless spirit of human endeavor in the high alpine.
