The West Echo Fire was discovered at around noon Friday, according to Utah Fire Info.
Utah Fire Info said fire crews had stopped the forward progress of the blaze at 12 acres around 1:30 p.m.
"The fire is human-caused," the agency said on Facebook. "And crews have made good progress with conditions currently looking favorable."
North Summit Fire District Battalion Chief Tyler Rowser says it is in the same area as the 2024 Dikker Hill fire. It is directly west of Echo Reservoir, about 1 mile from Interstate 80.
The National Weather Service office in Salt Lake City said all of Utah was experiencing moderate heat risk Friday afternoon. There were critical fire conditions across the border from Summit County in Uinta County, Wyoming, due to low humidifies and gusty winds.
This is a developing story.