Trail Run Project Logo

Old Kiln Trail



0.8 mile 1.3 kilometer point to point
89% Runnable


Ascent: 116' 35 m
Descent: -108' -33 m
High: 5,764' 1,757 m
Low: 5,648' 1,722 m


Avg Grade: 5% (3°)
Max Grade: 16% (9°)


Driving directions Take a virtual tour
Zoom in to see details
Map Key

Trail shared by Megan W

This trail can be used to add mileage or a bit of elevation to a typical Foothills Trail outing.

Megan W

Features Views · Wildflowers · Wildlife

No bikes allowed.

Runner Notes

The non-flooded parts of the Old Kiln Trail feature smooth, fine gravel surface. The section through the stream bed has loose rocks and sandy parts with difficult footing. Almost no shade.


The easy Old Kiln Trail is nearly a loop and can be followed in either direction. This description starts on the north end and travels counter clockwise.

From its signed junction with the Foothills North Trail, take the Old Kiln Trail north over flat open grassland. The initially easy, wide trail approaches the Four Mile Creek and parallels it along an eroded bank. The 2013 floods severely damaged the Old Kiln Trail and as of Spring 2015 there is still a tricky, narrow, eroded section to negotiate. Once past this obstacle, the northern section of the trail now drops down into the stream bed, traveling west aided by cairns. Just as the stream banks rise and begin to close in on the trail, the path has been routed up the southern bank to regain the grassy hillside. This spot has been marked with cairns but is not easy to see until you're very close.

Climb up a short rise between low hills, arriving soon at a stretch of wooden fence. Here is also the intersection with the Old Kiln Spur. The trail surface returns to well-maintained fine gravel beyond this point. Continue south on the Old Kiln Trail over a small seasonal stream. The remainder of the route traverses gently descending hillsides with wildflowers and views to the east and west. The Old Kiln Trail ends at an intersection with the Foothills North Trail just a short way south of where it started.

Flora & Fauna

Hawks, snakes, deer.

Run this trail?

We need help with the following missing trail information:

Need to Know

Is something wrong? Let us know. Have photos to share? Help fellow runners know what's here.


Rate This Trail

Rate Quality

   Clear Rating

Rate Difficulty

Share This Trail

Check In


Mar 9, 2019
Alyssa Countway
Feb 25, 2019
Charly Jackson
Dec 19, 2015
Katherine Dodd

Trail Ratings

  3.0 from 2 votes


  3.0 from 2 votes
5 Star
4 Star
3 Star
2 Star
1 Star
Trail Rankings


in Colorado


12 Views Last Month
1,267 Since May 28, 2015



Parts of the Old Kiln Trail were washed out in the 2013 flood
May 27, 2015 near Boulder, CO
From the flooded Fourmile creekbed, climb the ramp up the left bank (marked by cairn)
May 27, 2015 near Boulder, CO
Mysterious fence along the Old Kiln Trail
May 27, 2015 near Boulder, CO
Scrubby grasses and wildflowers along the Old Kiln Trail
May 27, 2015 near Boulder, CO
Views east from Old Kiln Trail
May 27, 2015 near Boulder, CO
At the junction of Foothills South and Old Kiln Trails
May 27, 2015 near Boulder, CO


Trail Run Project is part of the REI Co-op family,
where a life outdoors is a life well lived.

Shop REI Running