Trillium Lake
{{Short description|Lake in Oregon, United States}}
{{Use mdy dates|date=January 2025}}
{{Infobox body of water
| name = Trillium Lake
| image = Trilliumlake.jpg
| caption = Mount Hood seen from the lake
| image_bathymetry =
| caption_bathymetry =
| location = Clackamas County, Oregon, United States
| coords = {{coord|45.2673406|-121.7422998|type:waterbody_region:US-OR|format=dms|display=inline,title}}
{{cite gnis
| id = 1151417
| name = Trillium Lake
| accessdate = 2009-06-13 }}
| type = man made
| inflow = none
| outflow = Mud Creek
| catchment = {{convert|1|sqmi|km2|abbr=on}}
| basin_countries = United States
| length = {{convert|3000|ft|abbr=on}}
| width = {{convert|1400|ft|abbr=on}}
| area = {{convert|65|acre|abbr=on}}
| depth = {{convert|7|ft|abbr=on}}
| max-depth = {{convert|21|ft|abbr=on}}
| volume = {{convert|380|acre.ft|abbr=on|lk=in}}
| residence_time =
| shore =
| pushpin_map = Oregon#USA
| pushpin_label_position =
| pushpin_map_alt = Location of Trillium Lake in Oregon, USA.
| pushpin_map_caption =
| website =
{{cite web
| url = http://www.flyfishusa.com/about-our-waters/lakes/trillium-lake/trillium-lake.html
| title = Trillium Lake
| publisher = The Fly Fishing Shop, Welches, Oregon
| accessdate = 2008-02-26 }}{{cite web
| url = http://findlakes.com/trillium_lake_oregon~or00350.htm
| title = Trillium Lake
| publisher = Find Lakes
| accessdate = 2008-08-28
| archive-date = 2011-07-11
| archive-url = https://web.archive.org/web/20110711003355/http://findlakes.com/trillium_lake_oregon~or00350.htm
| url-status = dead
}}
| elevation = {{convert|3601|ft|m|abbr=on}}
| islands = 0
| cities = (none)
}}
Trillium Lake is a lake situated {{convert|7.5|mi|km}} south-southwest of Mount Hood in the U.S. state of Oregon. It is formed by a dam at the headwaters of Mud Creek, tributary to the Salmon River.[http://www.topoquest.com/map.php?lat=45.27053&lon=-121.73788&datum=nad27&zoom=4 TopoQuest - Trillium Lake, USGS Mount Hood South (OR) Topo Map] It was created by the state Department of Fish and Wildlife in 1960.
The area which is now the lake was part of the Barlow Road, a component of the Oregon Trail. A log road across marshes allowed immigrants to pass to Summit Meadow, which was a toll station 1866—1870.[http://www.byways.org/browse/byways/61400/places/61459/ Trillium Lake/Summit Meadow] Trillium is a genus of flowers particularly noticeable in the area.
The lake is popular for fishing, camping and photography, often clearly reflecting Mount Hood. Adjacent Trillium Lake Campground is administered by the Zigzag Ranger District of the Mount Hood National Forest. The large campground features a seasonal boat ramp and wheelchair-accessible floating dock.{{cite web
| url = http://159.121.106.106/osmb/index.cfm?fuseaction=facilityDisplay&BoatingFacilityUID=082003433
| title = Trillium Lake Camp
| publisher = Oregon State Marine Board
| work = Online Boating Facility Guide
| accessdate = 2008-08-28
}} The lake is a very popular Nordic skiing destination from a trailhead across U.S. Route 26 from Snow Bunny. Some resources note its popularity on afternoons and weekends.{{cite web
| url = http://www.gorp.com/parks-guide/travel-ta-mount-hood-national-forest-snow-sports-oregon-sidwcmdev_066577.html
| title = Mount Hood National Forest Cross-country Skiing
| publisher = GORP.com aka Orbitz Away LLC
| accessdate = 2008-08-28
}} Trillium Lake is circled by the {{convert|2|mi|km}} long Trillium Lake Trail.{{cite web|title=Trillium Lake Trail in Mount Hood National Forest|url=https://www.hikespeak.com/trails/trillium-lake-loop-government-camp-mount-hood/|website=hikespeak.com|accessdate=2020-05-22}}
File:Trillium Lake - Oregon - 2.JPG|The lake from Mount Hood
File:MountHood--Lake--Sunrise.jpg|The lake at sunrise
File:Trillium Lake in winter.jpg|The lake in winter