diff --git a/aoc2024.cabal b/aoc2024.cabal
index 8789b2d..e70b936 100644
--- a/aoc2024.cabal
+++ b/aoc2024.cabal
@@ -29,6 +29,7 @@ library
       Data.Matrix
       Data.Point
       Day1
+      Day10
       Day2
       Day3
       Day4
diff --git a/input/day10.txt b/input/day10.txt
new file mode 100644
index 0000000..2c0150a
--- /dev/null
+++ b/input/day10.txt
@@ -0,0 +1,55 @@
+3265810567887610176543232112345687657894520112310124343
+2178923456998543289432103001236799548765011201459835432
+3069434541047654343234304320189878039454324301267746301
+4454108932432105010145215617654360124565015892398657412
+5643237658347892189256789708763254103876546765489018543
+6762100549856783478765499899100123212981237894376529234
+9854001236765898543287306789230345101870892143489430143
+0123112345654387620196215276541236989896781002438321056
+1434876014567821212305454108910107858785432211320123987
+0567945623001930101414303267671098965676128340210784326
+1498732782122341210523412156782367874301039654325695012
+2389601095673234387674323045093450123212078769784596876
+1234515214984105498987634532112345219890198578693287945
+0145656303345096567898549601004876308763287657580176532
+1098745432296787450103438712345965438654346578432985401
+7887676501187698321212397103896876129860145569371092310
+6998389010067897454323788234887623078101233401287601223
+5467210327150156565610639948901012365265432314396540834
+0354343478943241078776548857612103454374301015893239985
+1298123567784332189789037766523328968989210126782178876
+4567034987694323476570126345435410871874323010561065710
+3089215676543210565234105430456701980165012123479874321
+2176304321031012910165234521367812341298783012980675012
+0125455890123329879874678901298989850345694503321589654
+1234126787001456765983107103456548766546587678932456783
+5434034576102345651012236012767632667632109765449321092
+6543467601234450141201345989898601898123678896358015601
+7612398532985983230345787671087789621014561201267454789
+8500120123876876567896094562545656789865010212102363210
+9145034534560745456987123043876549898774321347821078101
+1036765325671234547891212156965030105689833456901239821
+0129896010787565432180301207834121234387658921010143210
+2345687321895679001015401210121010567896567432987656978
+1066787438986988120876232349854101454987436543478967869
+9876096567630177638980143458063243043890122132567876554
+0945143452123210543987652967178952132101021091478745043
+1234232143010349898801201873297867873018962780369432132
+1233245056725656789754343234983458962103873676214345671
+0340196549834765608763452105672018743012964501108210980
+0658287654234897512014569010121029654523455612989432126
+1789808903145698763123678101291234549623896543076501087
+2565419012098765454094983214380165438712387054123457898
+3476320121010894345785670305678078329603432189014766527
+4989689032101923296654321494109989012506545673456895412
+7676788543432010187105656583212098103417656012187659303
+8545097656589101045234783672103107894328321043098748212
+9432165409677816676543294543014236765019410452129237326
+0121670318761965589430123678985345891054569567932106587
+7650181229650874594321210789076256702143678398867603496
+8542397834541123671010012698123105213432121210768712345
+9231456998432010789898763283434554396541030123459632434
+2110765107322989690176654196543676787612345014568541023
+2019894236011878521085545087212987988901456905873456911
+1238763245010965430294236789803101876216767876912367800
+0145632100123454340123107898714312345665898965101054321
diff --git a/src/Data/Matrix.hs b/src/Data/Matrix.hs
index f0328f7..4b687fd 100644
--- a/src/Data/Matrix.hs
+++ b/src/Data/Matrix.hs
@@ -13,6 +13,7 @@ module Data.Matrix
     groupByWith,
     filter,
     isInBounds,
+    points,
   )
 where
 
@@ -56,6 +57,9 @@ lookup position (Matrix hmap) = Map.lookup position hmap
 lookupMultiple :: [Point] -> Matrix v -> [v]
 lookupMultiple positions matrix = mapMaybe (`lookup` matrix) positions
 
+points :: Matrix v -> [Point]
+points (Matrix hmap) = Map.keys hmap
+
 insert :: Point -> v -> Matrix v -> Matrix v
 insert position value (Matrix hmap) =
   Matrix $
diff --git a/src/Day10.hs b/src/Day10.hs
new file mode 100644
index 0000000..1879e17
--- /dev/null
+++ b/src/Day10.hs
@@ -0,0 +1,43 @@
+module Day10 (partOne, partTwo) where
+
+import Data.Char (digitToInt)
+import Data.List (intersect)
+import Data.Matrix (Matrix)
+import qualified Data.Matrix as M
+import Data.Point (Point)
+
+partOne :: String -> Int
+partOne input = length $ filter (uncurry (isReachable matrix)) candidates
+  where
+    matrix = parseMatrix input
+    trailHeads = M.points $ M.filter (== 0) matrix
+    trailEnds = M.points $ M.filter (== 9) matrix
+    candidates = concatMap (zip trailHeads . repeat) trailEnds
+
+isReachable :: Matrix Int -> Point -> Point -> Bool
+isReachable matrix x y = go (getCandidates 1 x) [y] 1
+  where
+    go :: [Point] -> [Point] -> Int -> Bool
+    go _ _ 9 = False
+    go leftFront rightFront step =
+      let leftFront' = concatMap (getCandidates (1 + step)) leftFront
+          rightFront' = concatMap (getCandidates (9 - step)) rightFront
+       in not (null (leftFront `intersect` rightFront)) || go leftFront' rightFront' (step + 1)
+
+    getCandidates :: Int -> Point -> [Point]
+    getCandidates value (row, col) =
+      let positions = [(row + 1, col), (row - 1, col), (row, col + 1), (row, col - 1)]
+          values = map (`M.lookup` matrix) positions
+       in map fst
+            $ filter
+              ( \(_, mValue) -> case mValue of
+                  Nothing -> False
+                  Just v -> v == value
+              )
+            $ zip positions values
+
+partTwo :: String -> Int
+partTwo input = 0
+
+parseMatrix :: String -> Matrix Int
+parseMatrix = M.buildMatrix . map (map digitToInt) . lines