- Rating: Fair
- Conditions: Anglers report fair fishing. The water level is low, so it's difficult to launch boats. Calder has catch-and-release regulations. You can only use flies and lures: bait and scented or salted lures and flies are 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.