Yogyakarta, 4 October 2025 - The concept of the 15-Minute City emphasizes the importance of compact, mixed-use urban environments where residents can access essential services—such as markets, schools, and recreational spaces—within a 15-minute walk or cycle. This approach aligns with the broader goals of sustainable urban planning, reducing dependency on motorized transport and encouraging human-scale mobility. Using isochrone analysis, this study evaluates pedestrian accessibility toward Pasar Keramat, a key traditional market in the urban area of Mentawa Baru Ketapang Subdistrict, Sampit. The analysis was conducted by modeling travel-time zones from the market center, with time thresholds of 5 to 120 minutes. Spatial visualization shows that the 5–15 minute walking zone covers the urban core, characterized by high population density and well-connected street networks. Beyond the 20-minute zone, accessibility rapidly decreases, particularly in peripheral areas with fragmented road structures and limited pedestrian pathways.