Jack Keene, 17, from Hertfordshire, was involved in a collision between a Renault Clio and a minibus on the A4086 near Capel Curig in which five other people were injured.
His family described him as a kind, loving and selfless person who "touched the lives of all he met".
They thanked the emergency services and the people at the roadside who tried to save Jack.
In statement, they said: "As a family we are beyond heartbroken to have tragically lost our treasured and much loved son, brother, uncle and friend to so many."
Police are continuing to appeal for witnesses.
Officers want to speak to the occupants of a silver or grey coloured pick up vehicle that overtook a white mini bus between Plas y Brenin and Penygwryd before the incident at about 07:00 BST.
Police said it was not involved in the crash, but the driver may have seen the other vehicles before the incident.

The ventriloquist, who, with his puppet duck Orville became a staple of Saturday night TV in the 1980s, died last month aged 67.
Mourners gathered at the Sacred Heart Roman Catholic Church in his hometown to pay their respects.
The entertainer's fourth wife Sarah and her children attended the ceremony, alongside Coronation Street star Ken Morley and comedian Jimmy Cricket.
A floral tribute from the Nolan sisters read: "For Keith, a great pro, fantastic talent, [and] a lovely man who will be sorely missed"
Harris entertained generations of children with his sidekick Orville, a bright green duck who wore a nappy and spoke in a high-pitched voice.
He also gave life to the popular puppet Cuddles the monkey, whose catchphrase was 'I Hate That Duck!'.
At the height of his fame, he fronted The Keith Harris Show on BBC One and gave private performances at birthday parties for Prince William and his brother Harry, at the request of Diana, Princess of Wales.
His 1982 single, Orville's Song, was a top five hit, selling more than 400,000 copies.
Harris, who married four times and had three children, was first diagnosed with cancer in 2013 and became ill again in January.
He died in hospital in Blackpool on 28 April.

The company is in talks with several Japanese lenders over money it needs to reorganise its business in the wake of a massive accounting scandal.
The embattled electronics giant is hoping for loans of up to 250bn yen ($2.2bn; Â£1.6bn), said Nikkei daily.
Toshiba confirmed it was in talks but said the details had not been decided.
The Nikkei daily said Sumitomo Mitsui Banking, Mizuho Bank and Sumitomo Mitsui Trust Bank were like to provide the funds as early as this month.
The funds are vital for the survival of the Japanese conglomerate as it streamlines its bloated businesses, whose poor performances had gone unnoticed during almost a decade of false accounting.
The restructuring comes after the company admitted in 2015 it had overstated its profits by $1.3bn over seven years.
As part of the efforts to balance its books, the firm has announced major job cuts and the selling of several plants and units to external investors.
Toshiba currently employs almost 200,000 people.
Its shares have lost about 40% of their value since April last year, when news of the profit overstatement began to emerge.
In July, its chief executive, president and six other high-level executives resigned from the company.
Toshiba, which is involved in a wide-range of industries from electronics to nuclear energy, was founded in 1875 and launched the world's first mass-market laptop in 1985.
Police have named the teenager who died in a crash in Conwy county on Thursday.
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Friends of Keith Harris have joined his family at his funeral in Blackpool.
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Toshiba shares rallied more than 10% on Thursday on reports the firm was about to secure substantial new loans for its restructuring efforts.