1899 River Plate Rugby Union Championship

The 1899 River Plate Rugby Union championship was the inaugural season of the RPRU championship, the first rugby union club competition held in Argentina, organised by the "River Plate Rugby Union". It was contested by the five founding members of the RPRU: Belgrano, Rosario, Lomas, Buenos Aires, and Flores.
Uruguayan club Montevideo C.C. was invited to take part of the competition but they declined to participate due to the long travel time to Argentina by ship.
In the inaugural game, Lomas defeated Buenos Aires by 11-4. Lomas would be the first Argentine champion, winning the title at the end of the season.

Teams

;Notes

Results

List of matches played in the season. Rosario A.C. entered directly in the semifinals.

First round

Date	Home	Res.	Away	Venue
11 May	Lomas	11–4	Buenos Aires	Lomas Field
?	Flores	0–16	Belgrano	Flores Old Ground
28 May	Flores	0–24	Buenos Aires	Flores Old Ground
1 June	Belgrano	3–24	Buenos Aires	Virrey del Pino
4 June	Flores	5–15	Lomas	Lomas Field
11 June	Lomas	8–11	Buenos Aires	Lomas Field
18 June	Belgrano	17–3	Flores	Virrey del Pino
24 June	Buenos Aires	14–0	Flores	Lomas Field
25 June	Belgrano	3–0	Lomas	Virrey del Pino
2 July	Buenos Aires	3–5	Belgrano	Lomas Field
9 July	Flores	0–18	Lomas	Flores Old Ground
16 July	Lomas	10–3	Belgrano	Lomas Field

Semifinals

Date	Home	Res.	Away	Venue	City
23 July	Rosario	11–0	Buenos Aires	Plaza Jewell	Rosario

Date	Home	Res.	Away	Venue	City
23 July	Lomas	16–0	Belgrano	Flores Old Ground	Buenos Aires

Final

The final was played at Flores Old Ground in Caballito, Buenos Aires. All proceeds were donated to the British Hospital of Buenos Aires. In a match where both teams showed to be equalled in strength of play, Lomas won the game when they were awarded a free-kick that captain F.H. Jacobs scored for a 3–0 win.

Aftermath

It was the first and only championship contested by Flores A.C. A pioneer in several sports disciplines in Argentina, Flores A.C. had played its first match on 19 July 1896, against Buenos Aires F.C. In 1907 Flores Athletic sold some of its facilities to neighbor Club Ferro Carril Oeste, for m$n 700. It is believed that the club was dissolved after this transaction.
Before disappearing, Flores had also took part in the first Primera División championship in 1891. The polo team of the institution also won the fourth edition of Abierto de Polo in 1894.