Janet Veit and Brian Schumacher had been to Utah, the Sierra Nevadas and the East Coast on fly-fishing adventures.
The La Crescent, Minn., couple were on their first international trip this month in Iceland when Veit caught the biggest fish of her life, a 6-pound brown trout, her sister, Patrice Veit of River Falls, Wis., said on Monday.
They died Sunday night while on that trip when Schumacher stepped into deep, moving water and Veit jumped in to save him. Both were swept out into the lake.
"We take odd comfort in the fact that they died together, one thinking they were going to be saved, the other thinking they were going to be the savior," Patrice Veit said.
Patrice Veit received a text message Monday night with the details of what happened from a woman who befriended the couple on the trip.
Members of the group were on the shore and rushed to help them, but the weather was so bad they couldn't reach them in time.
The U.S. Embassy in Reykjavik called Patrice Sunday night with the news but few details.
Their bodies will be flown home. Services will be in La Crescent.