Trisha Calvarese, the Democrat running against Republican U.S. Rep. Lauren Boebert in Colorado’s 4th Congressional District, raised $570,000 in the first half of October, her campaign plans to report in Thursday’s campaign finance filing.

That’s more than Boebert reported raising during the previous three months, according to the Republican’s third quarter filing.

Congressional candidates are required to report contributions and expenditures from Oct. 1-16 in a pre-general election filing with the Federal Election Commission, due by midnight Thursday. As of 10 a.m., neither candidate had filed their report.

Covering Douglas County and the Eastern Plains, the 4th CD is the state’s most solidly Republican congressional seat.

The haul brings Calvarese’s total contributions this cycle to $3.75 million, most of which the first-time candidate has raised since winning the Democratic primary in June. That compares to the roughly $4.5 million raised by Boebert, one of the highest-profile GOP House members in the country, though Boebert spent heavily earlier this year to win a five-way GOP primary.

Calvarese’s campaign told Colorado Politics the candidate had about $250,000 cash on hand on Oct. 16 after spending $1.6 million during the pre-general reporting period.

During the 16-day period, the Democrat’s campaign received more than 31,800 contributions from 18,000 individual donors, just over one-third of whom were first-time donors, her campaign said.

The Cook Political Report and Larry Sabato’s Crystal Ball rate the race as a lock for the GOP, pointing to the Republicans’ big advantage in voter registration and the district’s voting history. The seat’s previous occupant, Republican Ken Buck, won his fifth term two years ago by a nearly 25-point margin.

Calvarese, however, is banking on polling her campaign has conducted that showed a tougher race for Boebert, who moved into the district earlier this year after nearly losing her seat in the Western Slope-based 3rd Congressional District.