Obesity is a medical condition in which excess body fat has accumulated to the extent that it may have a negative effect on health. People with obesity are at higher risk for health complications, such as diabetes, heart disease and some forms of cancer. Obesity is the second leading cause of preventable deaths after smoking. Worldwide obesity was more than 1.9 billion adults, 18 years and older were overweight. Overall 650 million people were obese. 39% of adults aged 18 years and over were overweight and 13% were obese. Objective: To explore the lifestyle risk factors among undergraduate students. Material and Methods: The study adopted exploratory research and was conducted at selected colleges of District Sirmour, H.P. A total of 30 undergraduate female students in the age group of 17-25 years were selected by multistage cluster random sampling technique. A self-structured questionnaire was used to assess the lifestyle risk factors associated with obesity among undergraduate students. Results: Data analysis was done with descriptive and inferential statistics. The pilot study finding shows that 33.3% of undergraduate girls were pre-obese. And 6.7 % of girls come under obese class 1 and 60% of girls having BMI in the normal range. The finding shows that the girls who were obese having menstrual irregularity and 33.3% of girls suffered from the polycystic ovarian disease. 33.3% Girls having a family history of obesity. There is a significant association between psychological factors and gynecological problems i.e 0.001**. Conclusion: The pilot study results show that unhealthy dietary habits and lifestyle behavior that should be targeted and can be modified. This could be achieved through promoting intervention program that leads to changing the built environment, weight management practices, counselling and affecting behavioral modification of student’s life style and dietary habits.