What is the terrain actually like?

Expect a "rail-trail" experience: packed gravel that is highly runnable and lacks the ankle-breaking roots of a typical forest singletrack. It is a gradual, flowing course that allows for steady pacing, but don't let the "flat" profile fool you—the psychological toll of running through 1.6 miles of pitch-black tunnel (the Taft Tunnel) can mess with your rhythm. You'll also cross 14 trestles on the 50K, which provide incredible views but require focus.

Check the routes here: Mapmyrun 50K ↗, Mapmyrun 25K ↗, Mapmyrun 15K ↗, and Mapmyrun 10K ↗.

Which distance should I pick?

If you want the full "Hiawatha" experience, the 50K is the only real choice; it hits 18 tunnels and 14 trestles, giving you the full sense of scale. The 25K is a solid middle ground if you want the scenery without the massive time commitment. The 10K and 15K are heavily tunnel-centric, making them great for shorter bursts, but you'll spend a disproportionate amount of your race in the dark.

What do I need to pack to survive the course?

This is a cup-free event, so if you show up without a handheld bottle or a hydration vest, you're going to have a bad time. Most importantly: a high-quality headlamp is non-negotiable. Do not skimp here; you need at least 500 lumens to navigate the tunnels safely. The temperature inside the tunnels is significantly cooler (~10°C / 50°F) than the outside air, so a light tunnel jacket is a smart move. Note that there is no cell service out here, so you are entirely reliant on the course support.

What are the timing cutoffs I should worry about?

The 50K is fairly generous with a 6.5-hour total limit, but there are two "danger zones": you must hit mile 10.25 by 8:15 AM or you’ll be downgraded to the 25K, and you must hit mile 17 by 9:40 AM or you're done. The 25K is also monitored for pacing to ensure the course stays clear.

How is the support on the course?

Aid stations are frequent (every 2–3 miles), which is great for the cup-free requirement. You'll find water, electrolytes, GU, and gummies. For the longer distances (25K/50K), the aid stations step up their game with extra food options. Toilets are available every 3–4 miles, and first aid is stationed at every stop. Just remember: there is zero cell service, so don't expect to call anyone if you get lost or hurt—rely on the bike patrol and volunteers.