Cougar Mountain Trail Run 2025

Oct

25

Cougar Mountain Trail Run 2025

Newcastle, Washington

7 Runnas

Happening on October 25, 2025, the fall edition of the Cougar Mountain Trail Run Series delivers a rugged and rewarding trail experience across the forested terrain of Cougar Mountain Regional Wildland Park. Runners can choose from four distances—5K, 7.6 miles, 19.5 miles, and a 50K ultra marathon—each offering single-track trails, rolling hills, creek crossings, fern-lined paths, and elevation ranging up to 7,200 feet of gain on the longer routes. Organized by the Seattle Running Club in collaboration with Northwest Trail Runs, the event supports King County Parks through race proceeds and volunteer hours. The community-driven atmosphere, well-marked courses, supportive volunteers, and generous cutoffs (up to ~5:00 PM) make this event accessible to trail runners of all levels. Whether you're chasing a technical PR or enjoying a scenic forest run, Cougar Mountain in October delivers a classic PNW trail experience with purpose.

Races

50 km

19.5 miles

7.6 miles

5 km

The 50 km Ultra is a demanding four-loop course covering scenic singletrack and ridge climbs, totaling ~7,200 ft of elevation gain—ideal for experienced trail runners. Organized by Seattle Running Club & Northwest Trail Runs, the event takes place on 25 October 2025, starting at Sky Country Trailhead, Cougar Mountain, Washington.

The 19.5‑mile race features three scenic loops around the park with ~3,700 ft of cumulative elevation gain, offering a technical and scenic autumn trail challenge. Produced by Seattle Running Club & Northwest Trail Runs, it runs on Saturday, 25 October 2025, at Cougar Mountain Regional Wildland Park, WA.

The 7.6‑mile race tackles rolling trail terrain with a total of ~1,150 ft of climbing, traversing a mix of trails and marshland-edge forest. Hosted by Seattle Running Club & Northwest Trail Runs, it's held on 25 October 2025 at the Sky Country Trailhead, Cougar Mountain.

The 5 km Trail Run offers a fast, runnable single-lap through lush forest and fern‑lined single-track on Cougar Mountain, totaling ~350 ft of elevation gain. Organized by Seattle Running Club & Northwest Trail Runs, it takes place on Saturday, 25 October 2025, at Sky Country Trailhead in Cougar Mountain Regional Wildland Park, King County, WA.

Weather based on historical averages.

FAQs

What is the Cougar Mountain Trail 50km?

How long is the Cougar Mountain Trail 50km?

Where does the Cougar Mountain Trail 50km take place?

What is the elevation gain of the Cougar Mountain Trail 50km?

How can I prepare for the Cougar Mountain Trail 50km?

How do I choose the right training plan for the Cougar Mountain Trail 50km?

The 50 km Ultra is a demanding four-loop course covering scenic singletrack and ridge climbs, totaling ~7,200 ft of elevation gain—ideal for experienced trail runners. Organized by Seattle Running Club & Northwest Trail Runs, the event takes place on 25 October 2025, starting at Sky Country Trailhead, Cougar Mountain, Washington.

The Cougar Mountain Trail 50km is 50km long.

The Cougar Mountain Trail 50km takes place in Newcastle, WA, USA.

The Cougar Mountain Trail 50km elevation gain is 2195 metres, which Runna classifies as a Hilly race.

The best way to train for the next race is to use a personalised 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 personalised 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 Cougar Mountain Trail 50km?

The 50 km Ultra is a demanding four-loop course covering scenic singletrack and ridge climbs, totaling ~7,200 ft of elevation gain—ideal for experienced trail runners. Organized by Seattle Running Club & Northwest Trail Runs, the event takes place on 25 October 2025, starting at Sky Country Trailhead, Cougar Mountain, Washington.

How long is the Cougar Mountain Trail 50km?

The Cougar Mountain Trail 50km is 50km long.

Where does the Cougar Mountain Trail 50km take place?

The Cougar Mountain Trail 50km takes place in Newcastle, WA, USA.

What is the elevation gain of the Cougar Mountain Trail 50km?

The Cougar Mountain Trail 50km elevation gain is 2195 metres, which Runna classifies as a Hilly race.

How can I prepare for the Cougar Mountain Trail 50km?

The best way to train for the next race is to use a personalised 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 Cougar Mountain Trail 50km?

Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.

Runna offers personalised 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 Cougar Mountain Trail 19.5 Miles?

How long is the Cougar Mountain Trail 19.5 Miles?

Where does the Cougar Mountain Trail 19.5 Miles take place?

What is the elevation gain of the Cougar Mountain Trail 19.5 Miles?

How can I prepare for the Cougar Mountain Trail 19.5 Miles?

How do I choose the right training plan for the Cougar Mountain Trail 19.5 Miles?

The 19.5‑mile race features three scenic loops around the park with ~3,700 ft of cumulative elevation gain, offering a technical and scenic autumn trail challenge. Produced by Seattle Running Club & Northwest Trail Runs, it runs on Saturday, 25 October 2025, at Cougar Mountain Regional Wildland Park, WA.

The Cougar Mountain Trail 19.5 Miles is 31km long.

The Cougar Mountain Trail 19.5 Miles takes place in Newcastle, WA, USA.

The Cougar Mountain Trail 19.5 Miles elevation gain is 1128 metres, which Runna classifies as a Hilly race.

The best way to train for the next race is to use a personalised 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 personalised 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 Cougar Mountain Trail 19.5 Miles?

The 19.5‑mile race features three scenic loops around the park with ~3,700 ft of cumulative elevation gain, offering a technical and scenic autumn trail challenge. Produced by Seattle Running Club & Northwest Trail Runs, it runs on Saturday, 25 October 2025, at Cougar Mountain Regional Wildland Park, WA.

How long is the Cougar Mountain Trail 19.5 Miles?

The Cougar Mountain Trail 19.5 Miles is 31km long.

Where does the Cougar Mountain Trail 19.5 Miles take place?

The Cougar Mountain Trail 19.5 Miles takes place in Newcastle, WA, USA.

What is the elevation gain of the Cougar Mountain Trail 19.5 Miles?

The Cougar Mountain Trail 19.5 Miles elevation gain is 1128 metres, which Runna classifies as a Hilly race.

How can I prepare for the Cougar Mountain Trail 19.5 Miles?

The best way to train for the next race is to use a personalised 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 Cougar Mountain Trail 19.5 Miles?

Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.

Runna offers personalised 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 Cougar Mountain Trail 7.6 Miles?

How long is the Cougar Mountain Trail 7.6 Miles?

Where does the Cougar Mountain Trail 7.6 Miles take place?

What is the elevation gain of the Cougar Mountain Trail 7.6 Miles?

How can I prepare for the Cougar Mountain Trail 7.6 Miles?

How do I choose the right training plan for the Cougar Mountain Trail 7.6 Miles?

The 7.6‑mile race tackles rolling trail terrain with a total of ~1,150 ft of climbing, traversing a mix of trails and marshland-edge forest. Hosted by Seattle Running Club & Northwest Trail Runs, it's held on 25 October 2025 at the Sky Country Trailhead, Cougar Mountain.

The Cougar Mountain Trail 7.6 Miles is 12km long.

The Cougar Mountain Trail 7.6 Miles takes place in Newcastle, WA, USA.

The Cougar Mountain Trail 7.6 Miles elevation gain is 351 metres, which Runna classifies as a Hilly race.

The best way to train for the next race is to use a personalised 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 personalised 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 Cougar Mountain Trail 7.6 Miles?

The 7.6‑mile race tackles rolling trail terrain with a total of ~1,150 ft of climbing, traversing a mix of trails and marshland-edge forest. Hosted by Seattle Running Club & Northwest Trail Runs, it's held on 25 October 2025 at the Sky Country Trailhead, Cougar Mountain.

How long is the Cougar Mountain Trail 7.6 Miles?

The Cougar Mountain Trail 7.6 Miles is 12km long.

Where does the Cougar Mountain Trail 7.6 Miles take place?

The Cougar Mountain Trail 7.6 Miles takes place in Newcastle, WA, USA.

What is the elevation gain of the Cougar Mountain Trail 7.6 Miles?

The Cougar Mountain Trail 7.6 Miles elevation gain is 351 metres, which Runna classifies as a Hilly race.

How can I prepare for the Cougar Mountain Trail 7.6 Miles?

The best way to train for the next race is to use a personalised 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 Cougar Mountain Trail 7.6 Miles?

Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.

Runna offers personalised 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 Cougar Mountain Trail 5km?

How long is the Cougar Mountain Trail 5km?

Where does the Cougar Mountain Trail 5km take place?

What is the elevation gain of the Cougar Mountain Trail 5km?

How can I prepare for the Cougar Mountain Trail 5km?

How do I choose the right training plan for the Cougar Mountain Trail 5km?

The 5 km Trail Run offers a fast, runnable single-lap through lush forest and fern‑lined single-track on Cougar Mountain, totaling ~350 ft of elevation gain. Organized by Seattle Running Club & Northwest Trail Runs, it takes place on Saturday, 25 October 2025, at Sky Country Trailhead in Cougar Mountain Regional Wildland Park, King County, WA.

The Cougar Mountain Trail 5km is 5km long.

The Cougar Mountain Trail 5km takes place in Newcastle, WA, USA.

The Cougar Mountain Trail 5km elevation gain is 107 metres, which Runna classifies as a Hilly race.

The best way to train for the next race is to use a personalised 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 personalised 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 Cougar Mountain Trail 5km?

The 5 km Trail Run offers a fast, runnable single-lap through lush forest and fern‑lined single-track on Cougar Mountain, totaling ~350 ft of elevation gain. Organized by Seattle Running Club & Northwest Trail Runs, it takes place on Saturday, 25 October 2025, at Sky Country Trailhead in Cougar Mountain Regional Wildland Park, King County, WA.

How long is the Cougar Mountain Trail 5km?

The Cougar Mountain Trail 5km is 5km long.

Where does the Cougar Mountain Trail 5km take place?

The Cougar Mountain Trail 5km takes place in Newcastle, WA, USA.

What is the elevation gain of the Cougar Mountain Trail 5km?

The Cougar Mountain Trail 5km elevation gain is 107 metres, which Runna classifies as a Hilly race.

How can I prepare for the Cougar Mountain Trail 5km?

The best way to train for the next race is to use a personalised 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 Cougar Mountain Trail 5km?

Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.

Runna offers personalised 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

Tags:

Park

Nature

This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Cougar Mountain Trail Run 2025 or Northwest Trail Runs. 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 Cougar Mountain Trail Run 2025 website.

More Races Like This