Crestline Sidewinder Loop Trail is actually 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 numerous activity options and it is best used from March until October. Dogs can also be able to use this trail.
Crestline is one of my favorite loops, which I recently realized joins with all the riparian trail which leads up to the Upper Hull’s Gulch area. It’s a beautiful hike, just bring a lot of water during the summer time and look out for cyclists!
Good overall hike however, not really a great area for birding. Only a few varieties and appearances on the day I had been there. This trail seems better for mountain biking than hiking and that’s mostly what you’ll see. It is a good length and relatively pretty if you like desert scenery. You will find a really small forested area at the start. The task level is probably near easy however with a route long enough to deter young children. The inclines are incredibly mild compared to other moderate rated desert trails like Harrison Hollows.
Great trail system with access from several different starting points. Highly recommend. Good for all ability levels, based on your choices obviously. Best trail for dog lovers! The Military Reserve posseses an off leash dog park and most trails are off leash. Take pleasure in the wildflowers in April & May! Among the must do trails in the Boise Foothills, Sidewinder is 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 in the Boise foothills. The tips originate from my trail guides, Biking in Boise and Boise Trail Guide. It’s essential to focus on the mid- to lower foothills trails during the early spring. The upper trails and the Boise Ridge Road remain snow-bound. The trails within the mid- to upper foothills, including the Watchman Trail, are still wet and greasy in a few places, so it’s better to wait for them to dry completely. Before you hit the trails, check out current trail conditions on the Ridge to Rivers website.
Military Reserve Short Loop – 2 miles, lower than an hour hiking time. Easy, with a short hill. Here’s a shorter tour for families and small kids. Start on the Toll Road Trailhead away from Mountain Cove Road. Rise the Toll Road Trail under a mile to a junction. Go left and ascend towards the initial summit of Military Ridge. Turn left and descend on a singletrack trail ultimately causing 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 for the Seaman’s Gulch/Hidden Springs right-hand turnoff. Go right and follow Seaman’s Gulch Way to a good paved parking area and restroom alongside a big water tank. Consider the Valley View Trail #111 off to the right, and then take the first left on Trail #110 to Phlox Trail #112, turn left and come back to the trailhead for any one-mile short loop. Now return back on Valley View, while keeping going to the true “valley view” viewpoint offered by the trail, hanging over the Boise Valley. The trail loops around to fknihd and returns towards the trailhead.
Cross-Foothills Ride (Intermediate; strenuous in places) – 10 miles. two hours riding time. Strong intermediate. Today, I rode up to the Corrals Trail (trailhead is 1.8 miles north of Curling Drive on Bogus Basin Road), rode Corrals to Corrals Summit, and after that 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 area 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 too.
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. When you get to the 8th Street trailhead from the Foothills Learning Center, turn right, cross 8th Street, and complete 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 to start at Camelsback Park, climb Hulls to the Crestline junction, ride Crestline back to the Sidewinder trailhead, climb Sidewinder, come down Trail #4 to the Hulls Crestline junction, and descend Hulls and Chickadee Ridge returning to Camelsback.