Diamond Lake (John Dellenback) Trail is a 10.5 mile moderately trafficked loop trail located near Glide, Oregon that features a lake and is good for all skill levels. The trail offers a number of activity options and is best used from April until October. Dogs are also able to use this trail but must be kept on leash.

10.5 miles
331 feet

dogs on leash

kid friendly




road biking




wild flowers


The Diamond Lake Trail, also known as the John Dellenback Trail, circles around Diamond Lake in Douglas County within the Umpqua National Forest. This paved bike path can be enjoyed by all bike types and biking abilities and is open to hikers, trail runners, and nordic skiers as well. The first half mile is wheelchair accessible. Horseback riding is prohibited along this trail. The bike path can be accessed from several points along the lake, including Diamond Lake Campground, South Shore Picnic Area, Diamond Lake Resort, Thielsen View Campground, and Broken Arrow Campground. The trail takes you along the lake and though the forest, passing many unique places in the area, and offers lake views of as well as beautiful views of Mount Bailey and Mount Thielsen. The area provides many other activities for any outdoor enthusiast. Whether you are camping or visiting for a day trip, you can make use of the South Shore Picnic Area which has picnic units with picnic tables, barbecue pits, horseshoe pits, a swimming beach, a volleyball court, and a playground for kids. Diamond Lake Campground is equipped with two boat ramps for access to the lake, flush toilets, picnic areas, and showers. There is also a fish cleaning station, as there is excellent rainbow trout fishing on the lake. This area is beautiful place with activities for all ages and is especially busy during the summer season.

4 months ago

We chose to “hike” this trail to get some miles in for the day and regretted it half way in. The lake views are beautiful, but half the trail takes you away from it through a mosquito infested forest. When you come back around towards the lake you’re basically walking through people’s campsites and it feels a little odd.

Saturday, October 22, 2016

I was here with American Hero Adventures(2016) and it was BEAUTIFUL!!! Very peaceful.

road biking
Tuesday, August 09, 2016

This is a fun 11 mile bike ride with great views of Mt. Bailey and Mt. Thielsen. At times you ride right alongside the lake and other times you ride through the forest away from the lake. I rode this trail 5 times on a 8 day camping trip. At first the hills are a little bit challenging but you get used to them pretty quickly.
My 9 year old daughter and 7 year old son completed this ride several times through out the week.
The north west corner of the lake is swampy and infested with mosquitoes, and as long as you keep moving they can't get you but if you have to stop, they eat you alive. By myself the ride took 45 minutes. with my 9 and 7 year olds it took 2 hours.

road biking
Wednesday, March 26, 2014

Love the 12 mile USFS bike path around Diamond Lake! Great views of Mt. Thielsen and Bailey.

Sunday, September 16, 2012

Diamond lake is great anytime of the year. In the winter you can rent snowmobiles and ride the trails, in the sprint and summer you can walk, bike or ride 4 wheelers. There is great fishing, boat rentals, a great pizza place, the lodge and cabins. I was not happy with the hotel as it seemed old and smelled musty. The cabins are older but are kept up for the most part.

Sunday, August 20, 2017

Monday, July 31, 2017

road biking
Tuesday, August 05, 2014