A group of five figures gathers at the right bank of a river, their bodies rendered in loose, sunlit strokes of ochre, pink, and brown. The water reflects their shapes in streaks of orange and white, rippling across the surface with thick, energetic brushwork. On the left bank, a single seated figure turns toward the group, his form defined by cool tones and a highlight that catches his shoulder and cheek.

The river divides the composition horizontally, with the broad expanse of water occupying the center and guiding the eye from one side to the other. Earthy browns and deep greens describe the banks, while quick, impasto strokes suggest grass and rough ground in the foreground. The figures on the right are closely huddled, their gestures and faces blurred by swift, expressive marks, evoking the movement and warmth of a summer day.

Sunlight falls strongly from above, illuminating the bodies and water, and casting the left figure partly in shadow. Short, visible brushstrokes dominate the surface, especially in the depiction of water and earth, creating a sense of immediacy and spontaneity. A signature reading 'J Sorolla B' appears in the lower left, confirming the hand of the artist. The title, En El Rio (At The Riverside), identifies the scene as one set by a river, matching the watery expanse and bathing figures.

Joaquín Sorolla is named as the creator, and the painting’s lively brushwork and sunlit palette are characteristic of his approach. The composition’s informal arrangement, with figures immersed in nature and light, reflects a moment of leisure and sociability. Sorolla’s technique is especially evident in the thick, textured application of paint, where each stroke remains visible and contributes to the shimmering effect of light on water and skin.

The artist’s focus on the fleeting qualities of sunlight and movement is reinforced by the rapid, almost sketch-like execution. The absence of detailed facial features or precise outlines allows the scene to pulse with life, capturing a vivid impression of a riverside gathering.