- Rating: Slow
- Conditions: Anglers report slow fishing from tubes and from the bank. Biologists have reported seeing an increase in dead fish along the shoreline. This is likely because warmer water is adding more stress to fish that are released. To help keep fish alive, please use stronger lines and bring fish in quickly. Try to keep their gills in the water at all times and make sure your hands are wet before handling them. Using rubber or silicon nets will prevent damage to scales and the fish's protective slime layer. Please park in the parking area and not on the ramp (inside the cattle guard); it will help others launch with fewer delays. Calder has catch-and-release regulations. You must use flies and lures only — bait is not allowed. See the Utah Fishing Guidebook for details.
- Location: Pot Creek on Diamond Mountain, Uintah County
- Directions: From State Highway 191, take the Pot Creek turnoff east at the Ashley National Forest, and drive about 15 miles east.
- Type: Blue Ribbon
- Size: 100 acres, 1500 acre-feet
- Elevation: 7,270 Feet
- Hours: No restrictions
- Likely catch: Rainbow Trout
- Possible catch: Cutthroat Trout
- Regulations: To see what statewide or special regulations apply to this waterbody, please read the current Fishing Guidebook.
- Site amenities: Calder Reservoir has a boat ramp, restrooms, garbage and primitive camping.
- Handicap access:
- Site description: Calder is a small reservoir located on Pot Creek on Diamond Mountain. It is the second reservoir of three on Pot Creek, along with Matt Warner and Crouse. Calder is managed as a Blue Ribbon trophy trout water. It is known for fast fishing for big, fat trout. Calder sits in a pretty basin surrounded by lodgepole and pinion and juniper trees. You also have an opportunity to see some of the many deer, elk and sage grouse in the area. This water is a little gem, Calder gets only moderate angling use.