Aesculus indica (Indian Horse Chestnut), a medicinal plant native to the Himalayan moist temperate forests, was investigated for its antibacterial and antioxidant properties across different altitudes.Leaf samples were collected from three sites in the Garhwal Himalaya: Khirsu (1807 m), Adwani Forest (2109 m), and Kanchula-Kharak (2637 m).Sequential extraction using acetone, methanol, and water was performed.Antibacterial activity against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli was assessed via agar well diffusion, while antioxidant capacity was measured using DPPH, FRAP, and ABTS assays.GC-MS anal. identified key phytochems. and their variation with altitude.The methanol extract from the highest altitude (Kanchula-Kharak) demonstrated the most potent antibacterial activity against Staphylococcus aureus, with a maximum inhibition zone of 22.33 ± 1.53 mm and the lowest MIC (7.50 mg/mL) and MBC (15 mg/mL) values observed in the acetone extractAntioxidant assays revealed the highest DPPH scavenging (IC50 27.87 ± 4.47 μg/mL) and ABTS inhibition (94.46 ± 1.27 %) in Kanchula-Kharak extracts, while the Adwani Forest methanol extract exhibited the highest FRAP value (62.65 ± 1.97 mmol Fe2+E/mg).GC-MS profiling revealed diverse phytocompounds, primarily triterpenoids, fatty acids, lipids, and hydrocarbons.Both antibacterial and antioxidant activities increased significantly with altitude.These findings suggest that altitude pos. influences the medicinal potential of A. indica, highlighting potential harvesting sites and their value for herbal formulation.