Slack-Weiss Reservoir
- Jun–Sep
- best months
Is Slack-Weiss Reservoir open right now?
Alert in the area
The Forest Service lists 3 alerts for Medicine Bow-Routt National Forest.
Access Impact: Big Creek Lakes Dam Project
Agency alert covering Medicine Bow-Routt National Forest · USFS · Medicine Bow-Routt National Forest
Trail & Access Impact: Stillwater Reservoir Project
Agency alert covering Medicine Bow-Routt National Forest · USFS · Medicine Bow-Routt National Forest
Snowy Range - 2026 Active Vegetation Operations
Agency alert covering Medicine Bow-Routt National Forest · USFS · Medicine Bow-Routt National Forest
As of · Source: USFS · Medicine Bow-Routt National Forest. Agencies don't list every closure — check before you go.
Slack-Weiss Reservoir is a 10-acre reservoir near Walden, Colorado, at about 8,971 feet. It is managed by the U.S. Forest Service.
Local outfitters
- Backdoor Sports25 mi away
- Rancho Del Rio39 mi away
Not on Roamze yet. Their page has how to reach them.
- Arapaho CreekCanoeing3.4 mi
- Arapaho RidgeHiking6.6 mi
- Grizzly CreekCanoeing6.8 mi
- SNYDER CREEK LOOPHiking8.6 mi
- Willow CreekCanoeing8.8 mi
Source: Roamze catalog (indexable pages within 10 miles, PostGIS distance)
- Confluence River AccessRiver fishing · ~47 min drive
- Seymour ReservoirLake fishing · ~6 min drive
- Muddy Creek Fishing Access and Kremmling CliffsRiver fishing · ~41 min drive
- Buffalo ReservoirLake fishing · ~7 min drive
- Powers Fishing AccessRiver fishing · ~45 min drive
- Van Valkenburg ReservoirLake fishing · ~11 min drive
- Sunset Bridge Fishing AccessRiver fishing · ~46 min drive
- Milk Creek ReservoirLake fishing · ~27 min drive
- Kimball Bridge (Highway 9)River fishing · ~46 min drive
- Albert ReservoirLake fishing · ~28 min drive
Also worth it near here
Whiteley PeakSummit · ~18 min drivePhoto: Jeffrey Beall, CC BY 4.0 (via Wikimedia Commons)
Moose-Goose Nature TrailHiking · ~22 min drivePhoto: RuggyBearLA, CC BY-SA 2.0 (via Flickr)- Dumont CampgroundCamping · ~24 min drive
TroublesomeMountain biking · ~25 min drivePhoto: cogdogblog, CC BY 2.0 (via Wikimedia Commons)
Best time to visit Slack-Weiss Reservoir
Best months: June–September. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.
Jan
28° / 7°
8 wet
Feb
31° / 9°
8 wet
Mar
40° / 15°
8 wet
Apr
49° / 23°
9 wet
May
59° / 30°
10 wet
Jun
71° / 36°
8 wet
Jul
77° / 42°
9 wet
Aug
76° / 40°
11 wet
Sep
68° / 34°
8 wet
Oct
55° / 25°
7 wet
Nov
39° / 16°
8 wet
Dec
29° / 9°
8 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Spicer, CO, 5.2 mi away at 8,385 ft. The station sits about 600 ft lower than this place, so expect it a little cooler here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
