Field trip: Conditioning Hiking Series
CHS 2 Hike - Mount Si
CHS hike led at a CHS 2 pace (2.0-2.5 mph). A moderately paced CHS2 hike to the base of the Mt Si haystack from the Mount Teneriffe Trailhead. This is a Go-Getter hike for elevation gain as the hike has 3150 feet gain and the May CHS2 specs are for 1500-2500 ft of gain.
- Sun, May 24, 2026
- Seattle Hiking Committee
- Day Hiking
- All Who Qualify, Adults
- Moderate/Strenuous
- Challenging
- Mileage: 10.0 mi
- Elevation Gain: 3,150 ft
- High Point Elevation: 4,000 ft
- Pace: 2.0-2.5mph
- 8 (8 capacity)
- 1 (2 capacity)
- Wed, Apr 22, 2026 at 3:00 PM
- Fri, May 22, 2026 at 5:00 PM
- Cancellation & Refund Policy
- iCal Google
From the Mount Teneriffe Trailhead, we'll take the Mount Teneriffe Trail up to the Si Teneriffe Connector Trail, then over to the base of the Mt Si Haystack where we will take a 20-30 minute lunch break. We'll descend via the Mount Si Main Trail, then take the Talus Loop trail back over to the Mount Teneriffe Trail and the trailhead.
Meet at the Mount Teneriffe Trailhead at 8am. There is a restroom at this trailhead. A Discover Pass is required for parking.
Google map link: Mount Teneriffe Trailhead
Carpool Option from Tibbets Valley park and ride in Issaquah at 7:15AM. Details will be in the Hello Hiker email.
Mount Si Main Trail
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Green Trails Mount Si NRCA No. 206S
Green Trails Mt Si No. 174
USGS Mt Si - See full route/place details.
Required Equipment
Ten Essential Systems
- Navigation (map & compass)
- Sun protection (sunglasses & sunscreen)
- Insulation (extra clothing)
- Illumination (headlamp/flashlight)
- First-aid supplies
- Fire (waterproof matches/lighter/candle)
- Repair kit and tools
- Nutrition (extra food)
- Hydration (extra water)
- Emergency shelter (tent/plastic tube tent/garbage bag)