Kenyans win; Americans strong.

BOSTON - The Kenyans are back in Boston after a relative lull that saw them shut out in the world’s most prestigious marathon twice in the past three years.

More surprisingly, so are the Americans.

Geoffrey Kirui won the 121st Boston Marathon on Monday, pulling away from three-time U.S. Olympian Galen Rupp with two miles to go to give Kenya its first men’s victory in five years. Edna Kiplagat won the women’s race to complete the Kenyan sweep.

They were followed closely by Americans who grabbed two of the top four women’s spots and six of the top 10 for men — the first time that’s happened since the race went professional in 1986.

“It’s so exciting to see Americans being competitive here,” said Rupp, the Olympic bronze medalist who was making his Boston debut. “It’s a real exciting time. And it’s awesome to see American distance running on the upswing and being competitive.”

Kirui finished in 2 hours, 9 minutes, 37 seconds to claim a silver trophy, a guilded olive wreath from Marathon, Greece, and the $150,000 first prize. Rupp was 21 seconds back, and Japan’s Suguru Osako 30 seconds behind him.

Rounding out the top 10 were runners from California, Arizona, Colorado, Oregon and Utah.

Kiplagat finished in 2:21:52 to win her Boston debut, adding the victory to two world championships and wins in London, New York and Los Angeles. She pulled ahead of Rose Chelimo of Bahrain in the Newton hills to win by 59 seconds.

American Jordan Hasay, making her first run at the 26.2-mile distance, was third and Desi Linden was fourth — the first time since 1991 that two U.S. women have finished in the top four.

“We keep getting closer,” said Linden.