By Seattle’s long summer days are perfect for squeezing in outdoor workouts after a busy day at work. For hikers and climbers who want to build endurance without sacrificing daylight, the trails along the I-90 corridor offer a perfect blend of challenge and scenery. After months of training, I’ve gathered some of my favorite routes that will get your heart pumping and legs ready for bigger weekend adventures.
Why Train Outdoors
Nothing beats the fresh air, uneven ground, and open views of the mountains when compared to treadmills or stair machines. Living close to the Central Cascades means I can swap gym lights for the glow of the sunset over evergreen ridges. Outdoor training not only builds strength but also enhances balance and mental clarity.
Training Tips
I typically start with 8 to 10 pounds in my pack and gradually increase the weight to around 30 pounds. Water bottles make excellent training weight — they’re easy to carry, can be emptied on the descent, and won’t strain your knees on the way down. My weekly routine usually includes one weekday hike and one longer weekend climb.
I record each hike with simple notes: date, mileage, elevation, and pack weight. Tracking your progress helps identify improvements in endurance and strength. If you’re not seeing results, consider adjusting your pace or frequency. A small journal or fitness app makes this easy.
Before You Hit the Trail
- Snow may linger on higher routes through June or July, so check recent trail reports.
- Bring the proper parking pass, such as the Discover Pass or Northwest Forest Pass.
- Keep valuables out of sight at trailheads.
- GPS stats may vary slightly depending on your device, so allow for minor differences.
Issaquah Alps
Cable Line Trail – West Tiger 3 Loop
5 miles, 1,941 feet gain
Just off I-90, this quick but steep trail is ideal for post-work hikes. You can descend via the gentler West Tiger 3 Trail to ease the strain on your knees.
Section Line Trail via High School Trail
5.8 miles, 2,209 feet gain
This lesser-known route offers a tough climb and fewer crowds. Start on the High School Trail, then connect to Section Line for a direct ascent to the summit shared with Cable Line and West Tiger #3.
North Bend
Old Si Trail
6.6 miles, 3,223 feet gain
Beginning at the Little Si parking lot, this steep, quieter alternative to Mount Si joins the main trail near the summit and offers a great conditioning workout.
Mount Si Trail
8 miles, 3,270 feet gain
A classic local favorite for building strength. The trail is straightforward, and weekday evenings bring fewer crowds than weekends.
Mount Washington Trail
8.5 miles, 3,134 feet gain
Starting from Olallie State Park, this steep trail winds through forested terrain before opening up near the summit. Be sure to bring a map—there are several unmarked junctions along the way.
Teneriffe Falls and Mount Teneriffe Loop
10 miles, 4,192 feet gain
This challenging hike features steep sections and rewarding views from Mount Teneriffe. A headlamp is handy if you’re finishing late.
Mailbox Peak – Old to New Trail Loop
7.9 miles, 3,825 feet gain
A local legend, this trail is as steep as it is rewarding. The “Old Trail” is short and direct, while the “New Trail” offers gentler switchbacks for the descent. On clear days, Mount Rainier makes a stunning appearance.
McClellan Butte
10 miles, 3,629 feet gain
This trail offers a more gradual climb but still packs a punch. The final scramble to the summit is optional but rewarding—avoid it when snow is present.
Snoqualmie Pass
Snoqualmie Mountain
3.8 miles, 3,105 feet gain
Park at Alpental Ski Resort and head toward the Snow Lake Trail before branching off to the right. Expect rocky terrain and steep grades that demand good traction.
Guye Peak
6 miles, 2,100 feet gain
Sharing the same start as Snoqualmie Mountain, this route diverges through a boulder field and climbs to a rugged summit with sweeping alpine views. Combine it with Snoqualmie Mountain for an added challenge.
Final Thoughts
These after-work hikes near Seattle prove that you don’t need a full day to build mountain fitness. Whether you’re preparing for alpine climbs or just looking for an active way to unwind, these trails offer the perfect mix of elevation, distance, and Pacific Northwest beauty. Lace up your boots, grab your pack, and make the most of those long summer evenings.
