I will say it flat out: This trail is not run-able on the way up. However, it is perfect if you are looking for a grind to work on your power hiking, which is exactly what I did with two of my former college track teammates.
As of last fall, a new trail was blazed by Washington Trails Association to Mailbox Peak, which is more gradual and run-able than the old trail. This has attracted more traffic to the popular destination, but only on the new trail. The old trail didn't have a trace of humankind when we hiked up on a beautiful bluebird day that would have had flocks of people at Mt. Si.
The trail gains 4000 ft in less than 3 miles, which is shown on the above topography map. The last push to the top goes directly up an exposed boulder field. The view at the top was one of the best I've experienced yet in the North Bend area with a panoramic view of the cascades. It felt like summer as we snacked at the top, and as you can see from the picture below there was almost zero snow! Rare for late February in the Pacific Northwest.
We didn't think to look in the mailbox until right before heading down, but it was FULL of goodies. Everything from a vintage bottle of coca cola, a bag of weed, a visitors journal and much much more....
Mailbox Peak: Exit 34 from I-90
Distance: 9.4 miles
Elevation Gain: 4000 ft
I am an outdoor and travel junkie who is currently completing my doctorate in occupational therapy overseas in rural Fiji. On Sweet World Travels you will find stories of my life with my husband, the communities we serve, and the many adventures we take.