Geography is a hands-on, minds-on subject which ought to be taught using interactive strategies like fieldwork for better performance. In Kenya, stakeholders are concerned about the way geography is taught in secondary schools in Nyakach due to perpetual declining performance. This study sought to examine the influence of utilization of fieldwork teaching strategy on learning and performance of learners in geography in public secondary schools in Nyakach. The study was underpinned by the social constructivists’ theory of learning which postulates that knowledge is believed to be constructed by individual learners in a social setting. The conceptual framework was based on the effect of independent variable (fieldwork) on the dependent variable (learning and performance in geography). Mixed methods approach was used. Concurrent triangulation design was utilised as both quantitative and qualitative data from various sources and contexts were compared and verified. The study used proportionate stratified, purposive, simple random and saturated sampling to arrive at various sample sizes. Data was collected through questionnaires, interviews, observations, focus group discussions and document analysis. Data obtained were coded for analysis using the Statistical Package for Social Sciences (SPSS) version 29. Quantitative data were analysed by descriptive statistics; frequency distribution, percentages; and means were used to draw inferences based on findings. Qualitative data were subjected to thematic analysis. The main findings of the study were that:38.3 % teachers use field work while 61.7% do not use it. Interviews and FDG’s emphasized that fieldwork was scarcely used hence limiting learning of geography. Conclusion is that field work is underutilized thus negatively affecting the instructional process. Teachers ought to use fieldwork optimally during instruction to help learners understand geography better hence attain higher results. These findings may be useful to stakeholders to fund and organize more field trips for students to improve learning and performance in geography.