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Routes
Running trails & routes
United States
Illinois
Cook County

Sag Valley Yellow Loop

Moderate

4.6

(9423)

18,701

runners

Sag Valley Yellow Loop

00:35

5.19km

50m

Running

Jog the Sag Valley Yellow Loop, a 3.2-mile moderate trail through diverse woodlands and scenic bluffs in Sag Valley Forest Preserve.

Last updated: February 26, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Sag Valley Forest Preserve

Waypoints

A

Start point

Parking

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1

2.30 km

Cap Sauers Holding Nature Preserve

Highlight • Forest

Embark on a serene journey at Cap Sauers Holding Nature Preserve, where the hustle of urban life fades away amidst the glacier-formed landscape. This hidden gem in Cook County offers …

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B

5.19 km

End point

Parking

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Way Types & Surfaces

Way Types

2.57 km

2.55 km

< 100 m

Surfaces

2.55 km

2.46 km

122 m

< 100 m

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Elevation

Elevation

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Weather

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Today

Saturday 23 May

19°C

13°C

0 %

Additional weather tips

Max wind speed: 16.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

Where can I park to access the Sag Valley Yellow Loop?

The Sag Valley Yellow Loop is part of the larger Palos Trail System. You can typically find parking at various access points within the Cook County Forest Preserve, which manages the area. Specific trailheads often have dedicated parking lots.

How challenging is the Sag Valley Yellow Loop for jogging?

This trail is generally considered moderate. It spans approximately 8.2 to 8.4 miles (12.6 km) with around 436 feet (133 meters) of elevation gain. While it requires a good level of fitness, the gentle elevation changes provide a solid workout without being overwhelming. Some sections have enough hills to get your heart pumping.

What kind of terrain should I expect on the trail?

The trail primarily features unpaved surfaces, including well-maintained, crushed limestone doubletrack. While some sections are wide and smooth, be prepared for rolling hills and varied elevation. There may be areas with sharp rocks, so appropriate footwear is recommended. You'll also cross several creeks via bridges.

When is the best time of year to jog the Sag Valley Yellow Loop?

The trail offers beautiful scenery year-round. Fall is particularly stunning with vibrant golds, oranges, and reds from the foliage. Summer provides lush green woodlands, and winter transforms the landscape into a peaceful, snow-covered scene. Spring brings beautiful wildflower views.

Is the Sag Valley Yellow Loop dog-friendly?

Yes, the Sag Valley Yellow Loop is dog-friendly. However, please ensure your dog is kept on a leash and that you clean up after them to maintain the trail's cleanliness and respect other users.

Are there any fees or permits required to use the Sag Valley Yellow Loop?

No, there are typically no fees or permits required to access the Sag Valley Yellow Loop, as it is part of the Cook County Forest Preserve system, which is generally free for public use.

What natural features and sights will I see along the way?

The trail is renowned for its 'jaw-dropping' scenery. You'll jog through dense woodlands, enjoy serene water vistas, and encounter beautiful wildflowers. A notable highlight is the Cap Sauers Holding Nature Preserve, and the trail is situated within Swallow Cliff Woods, featuring a towering 100-foot bluff with impressive views.

Does the Sag Valley Yellow Loop connect to other trails?

Yes, the Sag Valley Yellow Loop is part of the extensive Palos Trail System. It intersects with and shares sections of other trails, including the Green Trail, Sag Valley Trail System, and the Cal-Sag Trail. This connectivity allows you to easily customize the length of your run.

What should I bring for a jog on this trail?

Given the varied terrain and unpaved sections, we recommend wearing appropriate jogging footwear with good support. Bringing water, especially on warmer days, is essential. You might also consider a map or GPS device, though the trail is well-marked with yellow blazes.

Is the trail suitable for birdwatching?

Absolutely! The Sag Valley area is a haven for birdwatchers, with over 120 species recorded. Keep an eye out for various birds as you jog through the diverse habitats along the loop.

Is the Sag Valley Yellow Loop a circular route?

Yes, as the name suggests, the Sag Valley Yellow Loop is a circular route, meaning you will end your jog at the same point where you started, provided you complete the entire loop.

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