Advances　made　in　fabrication　of　patterned　surfaces　with　well-defined　dimensions　of　topographic　features　and　their　lateral　dissemination　drive　the　progress　in　interpretation　of　liquid　spreading,　adhesion,　and　retreat　on　engineered　solid　surfaces.　Despite　extensive　studies　on　liquid　droplet　spreading　and　adhesion　on　textured　surfaces　in　recent　years,　conformation　of　the　three-phase　contact　line　and　its　effect　on　macroscopic　contact　angle　and　droplet　adhesion　remain　the　focus　of　intensive　debate.　Here,　we　investigate　the　effect　of　surface　topography　on　the　adhesion　force　of　Cassie-Baxter-state　droplets　on　concentric　ring-textured　hydrophobic　surfaces　having　rings　with　lateral　dimensions　of　5,　10,　and　45　mu　m　and　separated　by　5,　6,　and　7　mu　m　trenches,　respectively,　with　fixed　depth　of　15　mu　m.　Unlike　mostly　tested　surfaces　textured　with　straight　ridges,　pores,　and　pillars,　where　the　droplet　base　contact　line　is　anisotropic　and　its　conformation　varies　along　the　apparent　boundary,　concentric　rings　are　symmetrical　and　reinforce　the　microscopic　contact　line　to　align　to　a　circular　one　that　reflects　the　shape　of　the　pattern.　In　this　study,　adhesion　forces　were　calculated　based　on　surface　tension　and　Laplace　pressure　forces　and　were　compared　with　the　experimental　forces　for　both　water　and　ethylene　glycol　droplets　having　a　varying　contact　diameter　on　the　concentric　ring-pattern　at　the　point　of　maximum　adhesion　force.　Results　show　that　the　microscopic　contact　line　of　the　liquid　retains　its　circular　shape　controlled　by　circular　rings　of　the　pattern,　irrespectively　of　the　droplet　base　diameter　larger　than　0.8　mm,　and　there　is　a　good　agreement　between　the　experimental　and　calculated　adhesion　forces.