Organized by Tunnel Marathons, the Tunnel Light Marathon will take place on September 14, 2025, starting at Hyak Sno Park Lot at Snoqualmie Pass and finishing near North Bend, Washington. This point-to-point course begins with a unique experience as runners traverse the Snoqualmie Tunnel, a dark, unlit passage stretching over two miles—headlamps are essential. Emerging from the tunnel, participants are greeted by breathtaking views of mountains and waterfalls as they continue along a gentle, consistent downhill grade, descending over 2,000 feet to the finish line. This USATF-certified course (Certification #WA21010RMB) is celebrated for its speed, with a significant percentage of runners achieving Boston Marathon qualifying times. The event includes well-stocked aid stations, drop bag services, and a welcoming post-race atmosphere, making it a favorite among marathon enthusiasts seeking both challenge and beauty.
Race
Marathon
Race Date:
14 September, 2025
The Tunnel Light Marathon is scheduled for September 14, 2025, starting at Hyak Sno-Park near Snoqualmie Pass, Washington, USA, and is organized by Tunnel Marathons. This point-to-point course features a consistent downhill grade, descending over 2,000 feet (approximately 610 meters) from start to finish. Runners begin with a unique 2.4-mile journey through the unlit Snoqualmie Tunnel—headlamps are recommended—before emerging to scenic views of the Cascade Mountains and waterfalls. The packed gravel trail and gentle decline make it an excellent opportunity for participants aiming to achieve personal records or qualify for the Boston Marathon.
Weather based on historical averages.
FAQs
What is the Tunnel Light Marathon?
How long is the Tunnel Light Marathon?
Where does the Tunnel Light Marathon take place?
What is the elevation gain of the Tunnel Light Marathon?
How can I prepare for the Tunnel Light Marathon?
How do I choose the right training plan for the Tunnel Light Marathon?
The Tunnel Light Marathon is scheduled for September 14, 2025, starting at Hyak Sno-Park near Snoqualmie Pass, Washington, USA, and is organized by Tunnel Marathons. This point-to-point course features a consistent downhill grade, descending over 2,000 feet (approximately 610 meters) from start to finish. Runners begin with a unique 2.4-mile journey through the unlit Snoqualmie Tunnel—headlamps are recommended—before emerging to scenic views of the Cascade Mountains and waterfalls. The packed gravel trail and gentle decline make it an excellent opportunity for participants aiming to achieve personal records or qualify for the Boston Marathon.
The Tunnel Light Marathon is 42km long.
The Tunnel Light Marathon takes place in North Bend, WA, USA.
Runna classifies the Tunnel Light Marathon elevation profile as Flat.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Tunnel Light Marathon?
The Tunnel Light Marathon is scheduled for September 14, 2025, starting at Hyak Sno-Park near Snoqualmie Pass, Washington, USA, and is organized by Tunnel Marathons. This point-to-point course features a consistent downhill grade, descending over 2,000 feet (approximately 610 meters) from start to finish. Runners begin with a unique 2.4-mile journey through the unlit Snoqualmie Tunnel—headlamps are recommended—before emerging to scenic views of the Cascade Mountains and waterfalls. The packed gravel trail and gentle decline make it an excellent opportunity for participants aiming to achieve personal records or qualify for the Boston Marathon.
How long is the Tunnel Light Marathon?
The Tunnel Light Marathon is 42km long.
Where does the Tunnel Light Marathon take place?
The Tunnel Light Marathon takes place in North Bend, WA, USA.
What is the elevation gain of the Tunnel Light Marathon?
Runna classifies the Tunnel Light Marathon elevation profile as Flat.
How can I prepare for the Tunnel Light Marathon?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Tunnel Light Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Tunnel Light Marathon or Tunnel Marathons. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Tunnel Light Marathon website.
