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Big Basin - Skyline to the Sea

  • (This event has been postponed until undefined)

This event has been postponed

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Running the length of the Sea Trail is one of the most popular running challenges in the region. With a marathon and a 50k route option this race is certainly not for the faint hearted, but the beautiful views and the ancient redwood forests make it all worthwhile.

Big Basin - Skyline to the Sea routes

An absolutely gorgeous event that showcases everything that California has to offer from the top of the highest mountains through the ancient redwood forests all the way to the coastline. Thankfully with the start being at approximately 2,500 feet runners will have a largely downhill route, but be warned this can be brutal on those knees.

Event Details

What’s Included
  • Race entry
  • Finisher's medal
  • Participators t-shirt (Early bird registration only)
  • Refreshments & Aid stations
  • Prizes for top performances (M/F)
Raceday Logistics


8:00 - 8:45AM - Race Number & Bib pick up

9:00AM - 50K and Marathon Start

Please allow enough time to get parked, registered and warmed up before the start of your event.


Spectators are encouraged to get down and cheer on their family and friends as they take on this epic race. The beautiful views and the redwood forests make for a beautiful picnic, but please note that the start and finish is not at the same place so you should aim to meet runners at the end of their race.


Volunteers are a huge part of bringing Coastal Trail Run's epic races to life. Roles vary from race-to-race but often include manning aid stations, helping at registration, or distributing those cherished finisher's medals.

In return, you will receive a 'standard' entry into a race if you help for 5 hours, $25 discount (2 hours), or $15 (1 hour).

If you would like to find out more then simple fill out the form here:

Frequently Asked Questions

How hilly is the Big Basin marathon and ultra?
The route is largely downhills, with one or two vertical climbs. Don't let the downhills fool you though they can be brutal on the knees.
Do I need to purchase a shuttle ticket for the Big Basin marathon?
If you need a shuttle ride then please purchase a ticket that includes the price of the shuttle, but if you have your own transport planned then you may opt for the cheaper option.
How many aid stations will there be on the Big Basin marathon?
There will be fully stocked aid stations every 5 - 8 miles and at each of them you should expect fruit, savoury snacks, candy and an abundance of refreshments and hydration options.
Have a question? Get answers from our team.

Is your question about booking your place? See our Help Center

Big Basin - Skyline to the Sea weather forecast

Mostly cloudy throughout the day.

Predicted highs
Predicted lows

Meet the organizer

Our events are located in amazingly beautiful parks and recreation areas in California. We are known for our well-marked courses, accurately measured distances, immediate race results, quality shirt designs, and low-key, friendly atmosphere. For courses that are designed to be easier, flatter, and faster, check out one of our Zoom or ZombieRunner events. We have organized over 400 events during the past 16 years. We love trail running and we promise you a rewarding experience.

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