Crestline Sidewinder Loop Trail is a 9.6 mile moderately trafficked loop trail located near Boise, Idaho that features beautiful wild flowers and it is rated as moderate. The trail offers several activity options and it is best used from March until October. Dogs are also able to utilize this trail.
Crestline is among my personal favorite loops, which I recently realized joins using the riparian trail that leads up to the Upper Hull’s Gulch area. It’s an attractive hike, just bring a lot of water in the summertime and look out for cyclists!
Good overall hike but not a real great area for birding. Not many varieties and appearances on the day I was there. This trail seems better for mountain biking than hiking and that’s mostly what you’ll see. It really is a good length and relatively pretty if you appreciate desert scenery. There exists a tiny forested area at the beginning. The challenge level is probably near easy however with a route long enough to deter small kids. The inclines are incredibly mild in comparison to other moderate rated desert trails like Harrison Hollows.
Great trail system with access from many different starting points. Strongly suggest. Beneficial to all ability levels, depending on your options needless to say. Best trail for dog owners! The Military Reserve comes with an off leash dog park and many trails are off leash. Enjoy the wildflowers in April & May! One of the need to do trails within the Boise Foothills, Sidewinder is really a nice climb, great view, along with a fun downhill. A bit crowded on weekends.
Below are a few strategies for dynamite hikes, trail-runs and bike rides inside the Boise foothills. The ideas come from my trail guides, Biking in Boise and Boise Trail Guide. It’s essential to focus on the mid- to lower foothills trails in early spring. The upper trails as well as the Boise Ridge Road are still snow-bound. The trails inside the mid- to upper foothills, such as the Watchman Trail, are still wet and greasy in certain places, so it’s best to wait so they can dry completely. Prior to deciding to hit the trails, take a look at current trail conditions on the Ridge to Rivers website.
Military Reserve Short Loop – 2 miles, under an hour hiking time. Easy, with a short hill. Here’s a shorter tour for families and small kids. Start at the Toll Road Trailhead from Mountain Cove Road. Go up the Toll Road Trail less than a mile to a junction. Go left and ascend towards the initial summit of Military Ridge. Turn left and descend on a singletrack trail resulting in Freestone Creek Trail over by the dirt road. Turn left on Freestone and return to the trailhead.
Seaman’s Gulch Double Loop – 3 miles total. 1 hours hiking time; 30-45 minutes running time; thirty minutes riding time. Easy. Take Hill Road west in Boise towards the Seaman’s Gulch/Hidden Springs right-hand turnoff. Go right and follow Seaman’s Gulch Road to a good paved parking area and restroom alongside a large water tank. Consider the Valley View Trail #111 to the right, and after that consider the first left on Trail #110 to Phlox Trail #112, turn left and go back to the trailhead for any one-mile short loop. Now go back on Valley View, while keeping going out to the actual “valley view” viewpoint provided by the trail, hanging higher than the Boise Valley. The trail loops around to fknihd and returns towards the trailhead.
Cross-Foothills Ride (Intermediate; strenuous in places) – 10 miles. 2 hours riding time. Strong intermediate. Today, I rode approximately the Corrals Trail (trailhead is 1.8 miles north of Curling Drive on Bogus Basin Road), rode Corrals to Corrals Summit, and then rode downhill on Corrals and Trail #1 to Hulls Gulch. Then I took Crestline Sidewinder Loop Trail to Military Reserve, and dropped out on the Freestone Creek Trail in Military Reserve near Fort Boise. The toughest part of the ride is climbing to Corrals Summit (3 miles uphill from trailhead, 1,200 feet of vertical gain). Then it’s mostly downhill to Military Reserve, with some uphill sections between. Fun ride! Hardy mountain trail runners would enjoy that route also.
Crestline-Hulls Loop – 7.25 miles. Moderate. 2.5 hours hiking time; 1.5 hours running time; 1.25 hours riding time. Intermediate. Start from Camelsback Park in Boise on N. 13th. Get the trailhead behind the tennis courts. Climb on Owls Roost and Kestrel to Crestline. Follow Crestline for the Hulls Gulch Junction. Turn left and descend on Hulls Gulch. It’s rocky and uneven in places. Whenever you get to the 8th Street trailhead through the Foothills Learning Center, turn right, cross 8th Street, and finish the ride on Red Fox Trail, which leads you back to Camelsback Park.
Variations on Crestline-Hulls Loop – Advanced. Ride the loop in reverse, or climb Hulls. It’s difficult, but fun! Another favorite of mine is always to start at Camelsback Park, climb Hulls towards the Crestline junction, ride Crestline back to the Sidewinder trailhead, climb Sidewinder, come down Trail #4 for the Hulls Crestline junction, and descend Hulls and Chickadee Ridge returning to Camelsback.