More than America’s oldest ultramarathon, the JFK 50 endures because of the kindness, community, and love that Mike Spinnler has nurtured across generations.

Most races don’t last six decades. Every November, the JFK 50 unfolds across the Appalachian Trail, a canal towpath, and country roads as a 50-mile test that has become the oldest continuously running ultramarathon in the United States. But what makes it endure isn’t just the course or its history. It’s the people who return year after year, the community that shows up in droves to ensure this race will not quit, and the race director who has quietly shaped it for more than three decades as only the second in its history.

Mike Spinnler has been at the heart of the JFK 50 as runner, champion, and steward, carrying forward a tradition that continues to inspire generations. He is, in many ways, the archetype of a role model. In this conversation, we reflect on how the course has shaped the athletes who run it, the volunteers who support it, and the man who has devoted his life to directing it.

Episode Description:

In this episode of Legwork, Matt and Molly sit down with Mike Spinnler, race director of the JFK 50, the oldest continuously run ultramarathon in the United States. They explore how the race has endured for more than 60 years — and why it continues to inspire across generations.

Together, they cover:

• Mike’s journey from 12-year-old participant to champion, and eventually to race director

• The stewardship lessons he learned from Buzz Sawyer and Greg Shank, and how he carries their legacy forward

• How kindness, community, and love have shaped the race as much as rules, permits, and logistics

• The role of volunteers, families, and local communities in sustaining the JFK 50

• The balance between tradition and change — from aid stations and cutoffs to super shoes and evolving strategies

• The challenges of race directing: from financial risk to government shutdowns, blizzards, and even the Beltway sniper

• What inspires Mike personally, and how he knows, without any doubt, the JFK 50 will thrive long after he steps aside
  

Whether you’re a seasoned ultrarunner, a first-time marathoner, or someone who simply cares about what makes communities strong, this episode offers an inside look at why the JFK 50 is more than just a race — it’s a living legacy.

Chapter List

00:00 Introduction to JFK 50 and Mike Spinnler Journey

08:51 Mike's Early Running Experiences and Influences

13:52 Transitioning to Competitive Running, And Winning the JFK50

23:47 Becoming the Race Director of JFK 50, And How Having the Best Partner Helps

30:39 How the JFK Keeps Going

35:58 The Importance of a Team Behind You And Delegation

39:13 Resilience and Persistence in the Face of Persistent and Resilient Challenges

42:56 Navigating Change and Tradition

45:33 The Role of Aid Stations in Leveling The Playing Field

53:58 The Famous 3 x 10m Marathon Paced (In a Day) Workout

01:00:57 Approaching Mike's Directing of the JFK50 More As A Coach Than An Administrator

01:05:10 Impact of Shoe Technology

01:06:52 Weaverton Cliffs And Watching Your Step

01:08:10 Navigating the Appalachian Trail

01:10:09 The Magic Of JFK50 Aid Stations And Volunteer Community

01:18:02 Advice for New Runners of the JFK50

01:24:37 For Mike, the JFK50 is like Christmas Morning And He's Excited To See What Will Happen

01:27:09 Supporting Runners Through ALL Paces, Not Just The Leaders

01:30:00 The Personal Impact of Race Directing And The Obligation Mike Feels To Those That Have Not Experienced The Race

01:35:08 Spontaneous Selflessness and Humanity Is All Around

01:39:38 Reflecting On How JFK50 Has Changed Him, The Power of Sports, And Giving Back

01:48:38 Advice Time: The Inside Tips On A Successful JFK50

02:02:23 Final Reflections

A practical guide to hiring a running coach — when to seek one, how to choose and work with one confidently, and why they can make all the difference.

Most runners think about hiring a coach only when they’re chasing a big PR or a major race. But the reality is that coaching isn’t just for elites, and it isn’t just about getting faster. The right coach at the right time can help you break through plateaus, return from setbacks with confidence, or simply take the decision fatigue out of training. And while coaching can be transformative, not every coach–athlete match works—knowing what to look for (and what to avoid) can make all the difference.

Episode Description

In this episode of Legwork, Matt and Molly take a practical look at the when, how, and why of hiring a running coach. Drawing on their own experiences as athletes and coaches, they explore what makes the coaching relationship truly valuable beyond the plan itself—and how runners can get the most out of it.

They walk through the key parts of the process:

• Why runners hire coaches — from chasing performance goals to wanting structure, support, or accountability

• Common barriers to hiring — cost, feeling like you're not worthy of coaching or that you need to be faster, or the social elements of running with a club or with your friends (all of which a good coach can help you manage and feel confident)

• What coaches can (and can’t) do — from individualized plans and race strategy to dispelling myths about gait analysis (which really can't be done visually) or “magic workouts”

• How to evaluate a coach — key questions to ask, understanding certifications, and exploring what experience they have with people like you

• How to be coachable — building trust, communicating openly, and knowing when it might be time to move on

• Red flags to watch for — warning signs that a coaching relationship may not be the right fit

Whether you’re considering coaching for the first time, thinking about switching coaches, or simply looking to get more from the relationship you already have, this episode gives you the tools to approach coaching with clarity and confidence.

Chapters

00:00 Our First Interaction With A Coach in High School

06:18 The Why, When, and How of Finding A Coach - Our Agenda

07:59 All The Reasons Runners Might Hire A Coach - Good And Bad

16:47 Primary Drivers Behind What Prevents us or is a Barrier to Hiring a Coach

26:11 How Coaches Can Help Athletes

33:31 Coaching Can Help In Understanding How Running Should Feel And Integrating Strength

39:40 The Role of Coaches in Race Planning

41:37 Setting Expectations: Things Coaches Can't Do (Like Visual Gait Analysis)

51:17 Setting Expectations: There is No Magic Workout or Secret Sauce

53:50 Communicating What We Want and Need Out of Coaching

01:04:48 Questions You Should Ask A Potential Coach

01:10:35 Evaluating Coach Qualifications and Certifications

01:22:47 How to Be A Coachable Athlete

01:33:38 Identifying Red Flags in Coaching Relationships

01:42:54 When It Might Be Time To Leave A Coach

Key Takeaways

• Coaching is about more than a plan. An individualized workout schedule is the bare minimum. The true value comes from problem-solving and helping athletes maximize training around the realities of life.

• Know your reasons for hiring a coach. Performance goals, structure, accountability, or breaking plateaus are all valid motivations—but intrinsic motivation matters most.

• Set realistic expectations. Coaches can’t provide magic workouts or fix biomechanics with a glance. What they can do is help you train smarter.

• Evaluate both sides of the relationship. Ask potential coaches about their philosophy, experience with athletes like you, and how they stay current. Be honest with yourself about what you need.

• Watch for red flags and know when to move on. Signs include coaches who don’t listen, insist on absolutes (“everyone must run 180 cadence”), take credit for your success but dodge responsibility for setbacks.

A practical guide to heat training for endurance runners —why it works, the science behind it, and how to apply protocols to boost performance year-round.

Most non-elite endurance athletes are leaving performance gains on the table. Heat training—often dismissed as something you only do before a hot race—is one of the most misunderstood and underutilized tools in the sport. Done right, it can boost cardiovascular capacity, improve recovery, and prepare you to train harder for longer—no matter the conditions on race day.

In this episode of Legwork, Matt and Molly explore the overlooked benefits and surprising versatility of heat training. Through stories from their own racing and coaching, they show how it can be more than a summer survival skill—it’s a year-round performance weapon hiding in plain sight.

Episode Description

This episode is your practical, research-backed guide to heat training—covering nearly everything an endurance athlete needs to know to apply it effectively and safely.

Matt and Molly break down the most up-to-date science on how heat affects performance, the physiological adaptations you’re aiming for, and the three proven methods to achieve them:

• ​Training in hot environments to closely mimic race conditions
• ​Layering to simulate heat when the weather won’t cooperate
• ​Passive post-workout heat exposure like saunas or hot-water immersion

They explain how to choose the right method for your situation—or make the most of the method you have available—and how to time it so benefits carry through to your race. You’ll also learn how long adaptations last, how to maintain them, and what to watch for in hydration, fueling, and recovery to avoid setbacks. Whether your target race is hot, cool, or somewhere in between, this episode gives you the tools to use heat training with precision—and see results when it matters most.

Chapters

00:00 Introduction to Heat Training and Personal Experiences Driving Our Understanding

05:49 The Primary Studies We Reviewed In Preparation For Our Heat Training Episode

08:05 Major Reasons Why You Should Care About Heat Training

12:42 Why Running In The Heat Is Challenging

20:21 Anecdotal Experience with Heat Training In Recent Ultra Performances

23:28 The Three Heat Training Methods We Cover and General Physiological Benefits of Heat Training

28:32 Thermal Regulation and Adaptations

31:12 Protocol by Protocol Analysis

32:53 Protocol 1: Training In A Hot Environment

46:06 Protocol 2: Adding Layers to Augment Heat of The Natural Environment

01:06:39 Protocol 3: Hot Dry Sauna and Hot Water Immersion (HWI) - Actual Implementation Steps

01:10:48 Protocol 3: Hot Sauna Benefits and Considerations

01:14:17 Protocol 3: How Water Immersion (HWI) Benefits and Considerations

01:19:35 Maintaining Heat Training Adaptations

01:22:56 Timing and Strategy for Heat Training

01:27:20 Safety Considerations When Heat Training

Top 5 Takeaways

1. ​Heat training is underutilized by most non-elite athletes—and can deliver benefits year-round, not just for hot races.
2. ​Three general methods to consider, some with higher efficacy than others but all can practically aid you: hot-environment training, layering to simulate heat, and passive heat exposure post-workout.
3. ​Core adaptations include increased plasma volume, earlier/more efficient sweating, electrolyte conservation, and lower core temperature.
4. ​Adaptations fade quickly—often within two weeks without exposure—but can be restored in as little as two days.
5. ​Safety is critical: hydrate before and after, adjust fueling for greater glycogen use, and be aware of individual risks like anemia.