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blueBlack Holly Holdridge Lakes State Recreation Area

  4.3 ( 18 ) Favorite

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18.9 mile 30.5 kilometer loop
100% Singletrack


Ascent: 815' 248 m
Descent: -816' -249 m
High: 1,054' 321 m
Low: 923' 281 m


Avg Grade: 2% (1°)
Max Grade: 9% (5°)


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Trail shared by Cori Chesnutt

From beginner to expert level trails, this ride has something for everyone.

Cori Chesnutt

E-Bikes Unknown

Features -none-

A Recreation Passport is required.

Hunting is permitted, please dress appropriately during hunting seasons.


Located in Northern Oakland County with the feel of being up north, Holdridge Lakes offers something for everyone! There are plenty of fun and flowing sections along with climbs that will make you think twice about your ride selection!

Need to Know

Parking is off of Hess Road, 1.5 miles north of Grange Hall Rd (Exit 101 off of I-75)

The trails are a mix of clay, sand and dirt. Please do not ride after rainfall.


Part of the Holly Recreation Area, the trail system consists of three main loops, North Loop, West Loop, and East Loop aka "Gruber's Grinder."

The Holdridge Trail system's flagship feature is the East Loop aka "Gruber's Grinder", a 15.5-mile advanced trail, Gruber's Grinder. It is very technical, much like Highland Recreation Area's mountain bike trails, and should be ridden by newcomers with caution.

The West Loop and North Loop are more accessible yet still quite fun, and the tech loop contains skinnies, drops, and rock and log piles for those who enjoy riding technical features. The Lake Loop adds an addition mile to the West Loop and consists of some tighter singletrack and many wooden boardwalks. While they are low/inset into the ground, riders should use caution as they are extremely slippery when wet!

Designed and maintained by the Michigan Mountain Biking Association CRAMBA Chapter, these trails are some of the best in southeastern Michigan. 25 miles of trail is broken into various loops that accommodate all age and skill level of riders, from beginner to expert. There are many lakes, ponds and swamp areas along all of the trails here. It's advised to wear bug spray in the summer months.

At the parking lot there is a small picnic shelter and grill, along with a hand pump that delivers great fresh water so you can come out and make a day of it!

Plenty of turtles can be seen sunning themselves on logs on sunny days!

History & Background

This trail system began its life as equestrian trails. When they had been all but abandoned, the Michigan Mountain Biking Association worked with the State on a trial basis to open it up to mountain biking. The rest is history!


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May 4, 2019
Ryan Diehl
West trail started muddy but cleared up. Had some down trees blocking the trail. North loop was all mud. 6.4mi — 0h 46m
Apr 24, 2019
Katie Oswald
The Black Diamond rating MIGHT be accurate for about 100 feet of the trail. The rest is intermediate at most if you've ever ridden outside of MI. 13mi — 1h 30m
Nov 30, 2018
Christian Clark
only did the west loop
Nov 5, 2018
AR Janette
Did West Loop, Tech loop, Lake loop, leave covered and a little muddy in a couple spots, but overall a good ride. This is a great trail that I try… 5.8mi
Oct 3, 2018
Erik Garland
Quite slippery today. Lots of leaves and slippery rocks and roots. Tough trail without a lot of flow. Difficult. Will be back. 13.6mi
Aug 19, 2018
Erik Schleede
Aug 18, 2018
Erik Schleede
Jul 8, 2018
Felix R

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  4.3 from 18 votes


  4.3 from 18 votes
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