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blueBlack Heil to Picture to Hall and Back

  4.4 ( 24 ) Favorite

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33.1 mile 53.3 kilometer loop
90% Singletrack


Ascent: 3,633' 1,107 m
Descent: -3,634' -1,108 m
High: 6,805' 2,074 m
Low: 5,356' 1,632 m


Avg Grade: 4% (2°)
Max Grade: 23% (13°)


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Trail shared by Jeremy Brodhead

A fantastic way to link together the Heil and Hall ranch trail systems for one big ride.

Jeremy Brodhead

E-Bikes Unknown

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This is one of the best ways to link up Heil and Hall ranches for 3,800 feet of climbing over rugged singletrack and absolutely ripping descents. Combine two of the best trail systems north of Boulder for this great, longer ride.

Start at the Heil Ranch parking lot off of Lefthand Canyon Rd. It is also possible to start in the middle from Lyons or at the Picture Rock trailhead.

I really like riding all loops in a clockwise direction. Be sure, however, to ride up Antelope Trail and down Bitterbrush - Upper Section when doing the Hall Ranch section!

Need to Know

During July and Aug. start early and bring lots of water. This can be a really long, hot ride if caught in the blazing sun.

For a bail out option, start in Lyons.


Classic start from Heil Ranch parking lot.

Here are the turn by turn directions. Further down are trail descriptions.

Basically, ride the Heil and Hall Loops in the clockwise directions but make sure to ride up Antelope Trail and down Bitterbrush - Upper Section when doing the Hall Ranch section!

Heil Ranch Section
1) Climb 2.57 miles up Wapiti Trail
2) Turn left onto Ponderosa Loop riding in a clockwise direction
3) At the overlook/bench, stay to the left to continue on Wild Turkey Trail
4) Head down Picture Rock trail for 5.5 miles

Picture Rock to Hall Ranch Connection
5) Turn right on the pavement (Red Gulch Rd)
6) Turn right on Old St Vrain Rd then another right onto 5th Ave and ride past the town of Lyons
7) Turn left onto Apple Valley Rd just before the bridge
8) Make your first left onto Antelope Drive and ride to the end/parking area

Hall Ranch
9 ) Climb one mile on Antelope Trail
10) Stay straight/right on Bitterbrush - Upper Section
11) I like to do the Nelson Loop clockwise, but it can be done in either direction
12) Head back down Bitterbrush - Upper Section after completing the Nelson Loop lollipop
13) Instead of heading down Antelope Trail turn right to briefly climb, then descend the rocky, technical Hall/Bitterbrush - Lower Section

Connection from Hall Ranch back to Picture Rock
14) Left on the paved road then make your first right onto Old St. Vrain Rd
15) Left onto Red Gulch Rd to Picture Rock trailhead

Heading back from Picture Rock through Heil Ranch
16) 5.5 miles up Picture Rock
17) Continue climbing left onto Wild Turkey Trail
18) Left onto Ponderosa Loop for a short climb
19) Final descent on Wapiti Trail to the Heil parking lot

Heil Ranch:
This trail climbs, mostly gradually, right from the trailhead. You'll start out on a rough dirt road, but don't worry - the singletrack starts just up ahead.

Once you hit the singletrack, it's a steady climb for about 2.5 miles, all the way up to the junction with the Ponderosa Loop. The trail mostly runs through a heavily forested area, so there's plenty of shade. You're likely to see deer or other wildlife along the trail - maybe even a black bear.

The area is extremely rocky, but the Boulder Mountainbike Alliance and others have done a lot of work to clean up the trail, make it flow better, smooth out the rocks, and keep it sustainable.

Halfway around the loop, you'll find a scenic overlook with a park bench - perfect for a breather and a snack. The overlook provides a far-off view of Hall Ranch below - which you can ride to by joining up with the Picture Rock trail.

Picture Rock:
The trail was designed and built by professional trail builders with a goal of making a sustainable trail that would entertain advanced riders, but still be rideable by most. The upper section of trail is quite rocky, just like the rest of Heil Ranch, and it can take quite a bit of energy to ride in either direction.

Descending from the connection with the Wild Turkey Trail at Heil, be prepared for about 2.5 miles of constant small rocks with some larger obstacles thrown in. Some beginner riders may have a hard time with this section.

About halfway down, you'll reach an old grain silo at the side of the trail, and the riding becomes smoother and generally easier from here. For advanced riders, the remaining section down to Lyons is flowy, fast, and very fun.

Hall Ranch:
The most commonly ridden trail (Bitterbrush - Lower Section) has a challenging technical rock garden that only fit, expert riders can clean bottom to top. The Nelson Loop has some beautiful views of the Arapahoe range and Longs Peak in addition to beautiful, flowing singletrack. Intermediate riders can find some suitable terrain by starting on the Antelope trail, that also leads to the Nelson Loop, but bypasses the technical rock garden on Bitterbrush - Lower Section.


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May 18, 2019
Charles Swarts
Nov 10, 2018
Sarah Niemeyer
Nov 4, 2018
Jeff Wang
One of the sickest rides that I've done (granted I just moved to Boulder). So fucking sick. Lower bitterbrush destroyed me. 31.8mi — 4h 30m
Sep 1, 2018
Paul Billings
Aug 7, 2018
Chuck McQuade
Jun 26, 2018
Eric Coe
32.9 roughy. Rode into the Lyons market for lunch 32.9mi
Jun 16, 2018
Clare Liu
May 24, 2018
Munson Farms
Awesome wild flowers on trail

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Trail Ratings

  4.4 from 24 votes


  4.4 from 24 votes
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19,526 Since Aug 2, 2014
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Al Head  
The directions should include a pit stop at Oskar Blues Brewery for a burger and beer to fuel the climb back up PR. Aug 31, 2014
Anonymous User
Anonymous User  
This is a wonderfully designed trail. My wife and I are med-intermediate riders. We had some areas to walk, but the entire trail can be ridden if in good condition and appropriately skilled. There were beautiful views. Take your time and enjoy. Take breaks and just take it all in. Its a trail where you can find your smile. Sep 3, 2014
Anonymous User
Anonymous User  
I agree Al. Oskar Blues rocks! Oct 19, 2014

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