South Twin Sister peak
South Twin Sister rises to 7,000 ft in Cascade-Range within the Cascade Range range.
Rising to an elevation of approximately 2,251 meters (7,385 feet), it offers breathtaking panoramic views of the surrounding area. The mountain is known for its rugged and challenging terrain, making it a popular destination for mountaineers and outdoor enthusiasts.
During the winter season, South Twin Sister receives a significant amount of snowfall due to its high elevation. Snowpack ranges from an average of 3 to 5 meters (10 to 16 feet), creating ideal conditions for winter sports such as skiing and snowboarding. The mountain's snowpack also contributes to the water supply of nearby creeks and rivers during the spring and summer months.
One notable feature of South Twin Sister is its runoff, which feeds into the picturesque Twin Creek and eventually flows into the Chehalis River. This water source supports a diverse ecosystem and provides habitat for various wildlife species.
The name "South Twin Sister" is derived from its proximity to its sister peak, North Twin Sister, located just a few kilometers away. The origin of the name and any additional lore or legends associated with the mountain are not widely documented. However, the sheer beauty and challenging nature of South Twin Sister continue to attract adventurers seeking a thrilling mountaineering experience.
For trail conditions and access, search Wikipedia or the local land manager's site. Browse other peaks in the Cascade-Range range.
Snowpack near South Twin Sister
Snow water equivalent and snowpack depth at SNOTEL stations near the peak. Best proxy for what's currently sitting on the summit.
| SNOTEL station | Snowpack | View |
|---|---|---|
| Elbow Lake | 1 in | → |
| Easy Pass | 71 in | → |
| Nohrsc Alpine Meadows | 28 in | → |
| Nohrsc Mf Nooksack | 25 in | → |
| Nohrsc 21a07 - Easy Pass Am | 74 in | → |
| Mf Nooksack | 26 in | → |
| Alpine Meadows | 27 in | → |
Streamflow near South Twin Sister
USGS streamgauges in the basin drained by this peak. Spring snowmelt from the summit feeds these flows.
| Gauge | Streamflow | View |
|---|---|---|
| Skagit River Near Concrete | 12,500 cfs | → |
| Cascade River At Marblemount | 1,020 cfs | → |
| Nooksack River At Ferndale | 2,140 cfs | → |
| Sauk River Near Sauk | 3,500 cfs | → |
| Skagit River Near Mount Vernon | 12,700 cfs | → |
| Skagit River At Marblemount | 5,080 cfs | → |
| Nooksack River At North Cedarville | 2,670 cfs | → |
Plan around incoming weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column -- snow at this elevation typically lags the radar signature by a few hours.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
What's around South Twin Sister
Ski areas, river runs, fishing spots, campgrounds, parks, reservoirs, and boat launches within driving distance of South Twin Sister.
Ski areas
- Dakota Ridge
- Mount Seymour
- Old 100 Mile House Ski Hill
- Leavenworth Ski Hill
- Yodelin
- White Pass Ski Area
River runs
- Headwaters In Ne1/4 Of Sec 23, T37n, R7e To Confluence With Soufh Fork Nooksack River
- Headwaters To Confluence With Bell Creek
- Bell Creek To Mt. Baker-Snoqualmie Nf Boundary
- Fish Hatchery To Confluence With South Fork Nooksack River
- Douglas Fir Campground To Mt. Baker Highway
- Nooksack Falls Power Plant To Fish Hatchery Near Kendall, Wa
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