The incorporation of biochar into asphalt binders has emerged as a promising and environmentally conscious strategy to enhance the mechanical, thermal, and rheological performance of paving materials while contributing to sustainable construction practices. This study focuses on the detailed evaluation of asphalt binder performance and characterization when modified with Larchwood biochar. Biochar was incorporated at dosages of 1%, 3%, and 5% by weight of the binder, enabling a comparative analysis of its influence across these concentrations. The experimental program includes both conventional tests, specifically penetration and viscosity, to evaluate the basic physical behavior of the modified binders, and advanced rheological testing using a Dynamic Shear Rheometer, including amplitude, frequency, and temperature sweeps. These rheological tests provide a comprehensive understanding of the material's viscoelastic response under varying loading and temperature conditions. In addition, the study incorporates short-term aging analysis using the Rolling Thin Film Oven procedure, which enables the assessment of the aging susceptibility and stability of the biochar-modified binders. Through Dynamic Shear Rheometer testing, parameters such as the complex shear modulus and the rutting index were analyzed in detail to assess how different biochar dosages influence binder stiffness, elasticity, and resistance to permanent deformation. The study seeks to establish a clear trend in the overall performance of the biochar-modified asphalt binder. In the long term, this research program aims to identify an optimal combination of biochar characteristics and dosage levels that provide a superior balance of performance and durability. The findings offer valuable insights into the functional mechanisms of biochar as a sustainable additive in asphalt modification and contribute to the broader understanding of environmentally responsible materials for pavement engineering.