---
title: "Mount Si - Route Beta Research (2026-01-30)"
description: "> **⚠️ AI-Generated Research Document** > > This document was generated by an AI assistant and should be used as a **starting point only**. > > **YOU MUST:** > > - Verify all critical information from primary sources > - Use your own judgment and experience to assess conditions and risk > - Cross-reference with current trip reports and local conditions > - Understand that conditions change rapidly"
type: skill
canonical_url: https://claudary.paisolsolutions.com/skills/2026-01-30-mount-si
source: "Claudary"
difficulty: intermediate
author: "Claude Code Knowledge Pack"
date: 2026-07-10T10:58:53.008Z
license: CC-BY-4.0
attribution: "Mount Si - Route Beta Research (2026-01-30) — Claudary (https://claudary.paisolsolutions.com/skills/2026-01-30-mount-si)"
---

# Mount Si - Route Beta Research (2026-01-30)
> **⚠️ AI-Generated Research Document** > > This document was generated by an AI assistant and should be used as a **starting point only**. > > **YOU MUST:** > > - Verify all critical information from primary sources > - Use your own judgment and experience to assess conditions and risk > - Cross-reference with current trip reports and local conditions > - Understand that conditions change rapidly

## Overview

# Mount Si - Route Beta Research (2026-01-30)

> **⚠️ AI-Generated Research Document**
>
> This document was generated by an AI assistant and should be used as a **starting point only**.
>
> **YOU MUST:**
>
> - Verify all critical information from primary sources
> - Use your own judgment and experience to assess conditions and risk
> - Cross-reference with current trip reports and local conditions
> - Understand that conditions change rapidly in the mountains
>
> **This is NOT a substitute for:**
>
> - Proper training and experience
> - Current weather and avalanche forecasts
> - Your own research and route planning
> - Sound mountaineering judgment
>
> The mountains are inherently dangerous. You are responsible for your own safety.

## Overview

Mount Si rises to **4,192 ft (1,278 m)** with 304 ft of prominence in King County, Washington. The peak is located at 47.506875, -121.738965 ([Google Maps](https://www.google.com/maps?q=47.506875,-121.738965) | [USGS Topo](https://ngmdb.usgs.gov/topoview/viewer/#15/47.5069/-121.7390)). The standard route is a **hiking trail** rated **Hard**.

Mount Si is the most popular hike in Washington State with over 100,000 annual visitors. The trail climbs steeply through old-growth forest via switchbacks to a summit meadow with views of Mount Rainier. The true summit, known as The Haystack, requires Class 3 scrambling and is optional.

**Sources:** [PeakBagger](https://www.peakbagger.com/peak.aspx?pid=2087), [WTA](https://www.wta.org/go-hiking/hikes/mount-si)

## Route

### Approach

**Mt. Si Trailhead** - Located 2.5 miles up Mt. Si Road from North Bend, Washington.

**Directions:** [View on Google Maps](https://www.google.com/maps/dir//47.4880,-121.7231)

### Access & Permits

#### Permits & Regulations

- **Washington State Discover Pass required** - $35/year or $11.50/day
- No wilderness permit needed
- Trailhead Direct bus service available on weekends (seasonal)
- Gate hours vary seasonally - check current hours before visiting

#### Road Conditions

Road conditions not confirmed for the current period. Mt. Si Road is typically maintained year-round but check for winter closures or restrictions.

### Route Description

**Main Trail (Mount Si Trail):**

The route covers approximately **8.0 miles round trip** with **3,150-3,532 ft** of elevation gain.

**Typical completion times:**

- **3-4 hours** (~2.5 mph, 1,000+ ft/hr): Experienced hikers, trail runners, fit climbers
- **5-6 hours** (~1.5 mph, 600 ft/hr): Average fitness, steady pace with brief breaks
- **7-8 hours** (~1.0 mph, 450 ft/hr): Relaxed pace, groups, taking time for photos

The trail begins at the Mt. Si Trailhead and immediately starts climbing through dense second-growth forest. The path follows well-maintained switchbacks, gaining elevation steadily. At approximately 2,100 ft, hikers reach Snag Flat, a relatively flat section that provides a brief respite from the climb.

Above Snag Flat, the trail continues its steep ascent through old-growth forest with occasional viewpoints. The upper portion of the trail breaks out of the forest into a large summit meadow with expansive views of the Cascade Range and Mount Rainier on clear days.

**Old Si Trail Alternative:**

- Distance: 6.5-7 miles round trip
- Elevation gain: ~3,300 ft
- Difficulty: Very Hard (steeper grade)
- Access via Little Si trailhead with Boulder Garden Loop connection
- Less crowded alternative with steeper terrain

### Crux

The crux is **The Haystack**, a rocky summit block located just beyond the main summit meadow. This section involves **Class 3 scrambling** with exposed moves and some loose rock.

The standard route takes the looker's right gully, then traverses to the summit block. Multiple trip reports confirm the scramble is more difficult than it appears and has resulted in injuries to inexperienced hikers. The rock can be slippery when wet.

In winter conditions, **ice axe and crampons** may be required. Not recommended without scrambling experience or in poor conditions.

### Hazards

- **Haystack scramble** - Class 3, exposed terrain with fall hazard. Many hikers have been injured attempting this section without proper experience.
- **Mountain goats** - Aggressive goats frequent the summit area. Do not approach, feed, or allow goats to lick packs/gear (they seek salt).
- **Overcrowded parking** - Lot fills early on weekends. Arrive before 7 AM or use Trailhead Direct bus service.
- **Winter conditions** - Upper trail frequently has ice and snow. Traction devices (microspikes/crampons) recommended November-April.
- **Wildlife habituation** - Animals beg for food near the summit. Do not feed wildlife.
- **Loose rock** - Scramble sections have loose rock requiring careful foot placement.

## Current Conditions

### Daylight

For **January 30, 2026**, sunrise is at **7:35 AM** and sunset at **5:05 PM**, providing **9.5 hours** of daylight. Civil twilight begins at **7:02 AM**, useful for planning early starts.

### Weather Forecast

The forecast shows a **wet pattern through the weekend** with rain likely Friday and Sunday. Light rain is expected Friday with 90% precipitation probability, drier conditions Saturday (29% chance), then showers returning Sunday (86% chance). Temperatures remain mild (32-53°F) with freezing levels well above the summit throughout the period. **Wednesday and Thursday offer the best weather window** with overcast skies but minimal precipitation (4-5% chance).

**Summary:** Avoid hiking Friday-Sunday due to rain; Wednesday-Thursday offer the driest conditions with overcast skies.

| Day | Conditions | Temperature | Precipitation |
|-----|-----------|-------------|---------------|
| Fri Jan 30, 2026 (Today) | 🌧️ Light rain | High: 40°F, Low: 38°F | 90% chance |
| Sat Jan 31, 2026 | 🌧️ Rain | High: 45°F, Low: 32°F | 29% chance |
| Sun Feb 1, 2026 | 🌧️ Showers | High: 35°F, Low: 32°F | 86% chance |
| Mon Feb 2, 2026 | 🌧️ Heavy drizzle | High: 35°F, Low: 31°F | 57% chance |
| Tue Feb 3, 2026 | 🌧️ Drizzle | High: 48°F, Low: 34°F | 24% chance |
| Wed Feb 4, 2026 | ☁️ Overcast | High: 50°F, Low: 33°F | 5% chance |
| Thu Feb 5, 2026 | ☁️ Overcast | High: 53°F, Low: 36°F | 4% chance |

**Air Quality:**

Air quality is **good** (AQI 36-44) during the forecast period.

**Check Current Forecasts:**

- [Mountain-Forecast.com](https://www.mountain-forecast.com/peaks/Mount-Si/forecasts/1278) - Summit-level forecast with multiple elevations
- [Open-Meteo Weather](https://open-meteo.com/en/docs#latitude=47.506875&longitude=-121.738965) - Detailed mountain weather data (source for this report)
- [Open-Meteo Air Quality](https://air-quality-api.open-meteo.com/v1/air-quality?latitude=47.506875&longitude=-121.738965) - Air quality forecast for this location
- [NOAA Point Forecast](https://forecast.weather.gov/MapClick.php?lat=47.506875&lon=-121.738965) - Official NWS forecast and alerts
- [NWAC Mountain Weather](https://nwac.us/mountain-weather-forecast/)

### Avalanche Forecast

Mount Si is generally below avalanche terrain on the main trail. However, The Haystack and adjacent areas may have avalanche exposure in winter conditions.

**Check:** [NWAC Stevens Pass Forecast](https://nwac.us/avalanche-forecast/#stevens-pass) for regional conditions.

## Trip Reports

Mount Si has 4,271 total ascents logged on PeakBagger with 710 trip reports and 216 GPX tracks. The peak saw 257 ascents in the past year. Recent reports indicate dry trail conditions with no snow or ice on the main trail as of late January 2026.

### Most Detailed Reports

**Washington Trails Association:**

- **2026-01-29** - [Happypants](https://www.wta.org/go-hiking/trip-reports) - First summit, 2:15 up, dry conditions
- **2026-01-27** - [Outside Nancy](https://www.wta.org/go-hiking/trip-reports) - 7.8mi loop, dry trails, no ice
- **2026-01-24** - [youcandoit](https://www.wta.org/go-hiking/trip-reports) - Haystack scramble, dry conditions
- **2026-01-21** - [Pika Seeker](https://www.wta.org/go-hiking/trip-reports) - 10.5mi full loop, dry rock
- **2026-01-17** - [AdamGl](https://www.wta.org/go-hiking/trip-reports) - Packed trail, bluebird day, no snow

**PeakBagger:**

- **2025-08-30** - [Nate Sundeen](https://www.peakbagger.com/climber/ascent.aspx?aid=2087) - 📝 243 words, detailed Haystack beta
- **2026-01-25** - [Caleb Clark](https://www.peakbagger.com/climber/ascent.aspx?aid=2087) - Haystack snow-free, Class 3, 📍 GPX
- **2025-12-29** - [Susan Shih](https://www.peakbagger.com/climber/ascent.aspx?aid=2087) - Mountaineers group, snowshoes for side peaks

### Browse All Trip Reports

- [PeakBagger Ascents](https://www.peakbagger.com/climber/PeakAscents.aspx?pid=2087) - Individual climb logs with optional GPX tracks and reports
- [Washington Trails Association](https://www.wta.org/go-hiking/hikes/mount-si) - User-submitted trip reports with photos and conditions

## Information Gaps

- AllTrails direct access blocked (403 error) - cloudscrape fallback used
- SummitPost WebFetch blocked - cloudscrape fallback used
- Mountaineers trip reports not fetched - check manually for detailed reports
- Road conditions not confirmed for current period
- Current parking lot status unknown
- Individual WTA trip report URLs not extracted - links above point to general trip reports page

## Data Sources

- PeakBagger: https://www.peakbagger.com/peak.aspx?pid=2087
- Washington Trails Association: https://www.wta.org/go-hiking/hikes/mount-si
- Open-Meteo Weather API: https://open-meteo.com/en/docs#latitude=47.506875&longitude=-121.738965
- NWAC Avalanche: https://nwac.us/avalanche-forecast/#stevens-pass

---

*Research completed 2026-01-30 using [route-researcher](https://github.com/dreamiurg/claude-mountaineering-skills/tree/main/skills/route-researcher) from the [Claude Mountaineering Skills](https://github.com/dreamiurg/claude-mountaineering-skills) repository.*

---

Source: [Claudary](https://claudary.paisolsolutions.com/skills/2026-01-30-mount-si) · https://claudary.paisolsolutions.com