In the boys tournament, Jake Welch of Highlands Ranch shot a 4-under-par 68 at Todd Creek Golf Club in Thornton to take a one-stroke lead into Wednesday’s final round. But eight players are either one or two shots out of the lead, and another four are four back.

Welch finished with six birdies and a double bogey in round 2 to check in at 4-under 140 overall.

Five players share second place at 141, including first-round leader TJ Shehee of Mead (75 on Tuesday), Walker Franklin of Broomfield (70), Jack Hughes of Aspen (71), Ryan Liao of Littleton (72) and Connor Jones of Westminster (69).

Among those at 142 is Dillon Stewart of Fort Collins, winner of the AJGA Hale Irwin Colorado Junior last month, who carded a second-round 68.

In the girls competition, three players share the lead at 8-over-par 152 — Meghan Vogt of Broomfield, Marie Jordaan of Lakewood and Josie Baker of Sherman Oaks, Calif.

Vogt, who qualified last month for the U.S. Girls’ Junior, shot a second-round 75, while Jordaan had a 76 and Baker a 77.

First-round leader Katie Berrian of Castle Rock holds fourth place at 154 after posting an 82 on Tuesday. Emma Bryant of Aurora, the 5A girls state high school champion, is another stroke back after a second-round 78.

For the scores from the Colorado Junior Amateur, click BOYS, GIRLS.

Meanwhile, in the girls tournament, top-seeded Amy Chitkoksoong of Aurora, the 2017 girls 5A state high school champ, chalked up two victories on Tuesday to advance to the semifinals.

Also making the girls semis were Emma Bryant of Aurora, Sydney Eye of Golden and Josie Baker of Sherman Oaks, Calif. In Wednesday morning’s final four, Chitkoksoong will face Baker and Bryant will square off with Eye. Chitkoksoong won this title in 2015 at age 14. Bryant has been the most dominant player so far, winning her matches 5 and 3, 8 and 6, and 6 and 5.

Joining Pearson, a finalist in the CGA Match Play earlier this year, as semifinalists on the boys side are top-seeded Jack Castiglia of Lakewood, Luke Travins of Colorado Springs and Ty Findlow of Lone Tree. In the semis, Castiglia will play Travins and Pearson will face Findlow.

In Tuesday’s quarterfinals, Trujillo birdied the 15th and 16th holes for wins to square the match, but Pearson parred No. 17 to win the hole and he and Trujillo halved 18 with pars.

In his quarterfinal, Castiglia was 2 down through 12 to Kirby Coe-Kirkham of Sheridan, Wyo., but squared things with an eagle on the 15th, then went 1 up with a birdie on the 17th before halving No. 18 with a par.

And Findlow beat Tyler Severin of Johnstown with a birdie on the 19th hole after being 2 down through 15 holes.

The winners of this morning’s semifinal matches will meet in the finals on Wednesday afternoon.

For the brackets for each tournament, click on the following: BOYS, GIRLS.