The Study Aimed to Identify the Impact of Tapering Peak Using The Linear Method On Some Physiological Variables And The Digital Level Of Female Cross-Country Race Athletes. The Experimental Method Was Used on A Deliberate Sample of Under-18Y Female Egyptian National Athletics Team Players. The Basic Research Sample Was (6), Whereby Tapering Peak Was Used During the Pre-Competition Period Within Their Training Program for Two Weeks. After Completing the Application, Post-Measurements Were Taken. Dimensioning The Study Sample, Processing the Data Statistically, Then Presenting and Discussing the Results. The Most Important Conclusions Were That Tapering Peak Had a Positive Effect on The Physiological Variables: Red Blood Cells (9.88%), Ferritin (28.22%), Erythropoietin (34.75%), And Finally Hemoglobin (2.32%), And Improving The Digital Level Of Young Female Cross-Country Athletes By (2.16). %) The Most Important Recommendation Was to Use The Tapering Peak Using A Linear Method In The Taper Phase Before Competitions Because Of Its Importance In Improving The Digital Level Of Young Female Cross-Country Athletes.