Highest peak
Mailbox Peak
4,845 ft / 1,476 m
Most prominent peak
Rattlesnake Mountain East Peak
2,520 ft / 768 m prom
Most climbed peak
Mount Si
353 climbs
Most difficult peak
Mailbox Peak
Class 1
Difficulty breakdown
Class 1/2 2 peaks
Class 3/4 1 peak
Highlights
Latest climbs

"July 4 🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸
Trail run up Little Si in the morning, good view of Mount Si and post-peak bakery run at The North Bend Bakery. Definitely go there! (oreo milkshakes looked delicious)
🦅🦅🦅🦅🦅🦅🦅🦅" — summit • Jul 4, 2025

"Some sections past the Ira Springs connector were pretty overgrown. Also, getting to Dirtybox from DHP would have involved climbing down about 15 ft or so on a rope, so I decided not to. I'll try Dirtybox from the Mailbox side instead." — mathiasricken • Jul 21, 2024

"Some sections past the Ira Springs connector were pretty overgrown. Also, getting to Dirtybox from DHP would have involved climbing down about 15 ft or so on a rope, so I decided not to. I'll try Dirtybox from the Mailbox side instead." — mathiasricken • Jul 21, 2024

"Decided we wanted some off-trail fun close to home and boy did we get that. AK and I started at the lower Tinkham Road trailhead @ 7 am and found our way back there about 10 hours later. We created a loop which had us on top of 6 different peaks, a single day PR for me (in order): Dirty Harry's Balcony, Dirty Harry's Peak, Coincidence Point, Webb Mountain, P3, Defiance. It was extremely slow going between Dirty Harry's Peak and Webb Mountain -- maximum bushwhacking and negotiating the endless boulders on that thing was exhausting. My favorite part was probably the traverse between Webb and Defiance. " — zachmitch • Jun 29, 2024

"Another week, another hike up Mailbox with AK. This time, however, with a quick peak at Dirtybox. Really enjoyed the scrambling after the leg work. Cloudy and in the high 40's, parking lot was insanely overflowed" — zachmitch • Jun 1, 2024