Corcovado National Park Trails

Los Patos - Sirena

PICTURES

Other than small trails around the Sirena, Los Patos, and San Pedrillo ranger stations, the Los Patos-Sirena trail is the only inland trail in the park that is maintained.  The trail is listed as 17 kilometers in length, though we measured the distance between the two stations along the trail as 15.9 km.  The maps below show the trail route through the park and a few of the milestones.  The chart at the bottom shows that there are only 180 meters of total relief and that the trail generally descends from Los Patos through the Corcovado lowlands. 

The Los Patos - Sirena trail is a relatively shallow trail compared to other passes through the Osa highlands.  The highland portion of the trail in the vicinity of Los Patos is secondary forest several decades old.  Original old growth begins as the topography flattens in the Corcovado basin which begins around the first Sirena river crossing, about one third of the way toward Sirena.  The primary lowland forest of Corcovado is renowned for its abundance of wildlife, and unless the trail has been heavily, the average hiker can expect to see the tracks of tapirs, peccaries, coatimundis, agoutis, and a wide variety of bird species.  A tremendous abundance of wildlife inhabits the forest in the vicinity of Sirena, and hikers that move quietly and pay attention are likely to see a huge abundance of wildlife, particularly early in the morning and late in the afternoon and at night.

WP Time Dist Elevation Description
    meters meters  
926 9:43 0.00 137 LOS PATOS RANGER STATION
927 9:45 0.16 180 Baco Trail
928 9:49 0.21 150  
929 9:53 0.36 160  
930 10:01 0.72 185  
931 10:04 0.92 154  
932 10:06 1.00 150  
933 10:09 1.08 150  
934 10:17 1.21 132  
935 10:21 1.29 131  
936 10:22 1.36 130  
937 10:25 1.47 139  
938 10:28 1.57 118  
939 10:31 1.67 133  
940 10:36 1.89 148  
941 10:39 2.03 117  
942 10:42 2.16 143  
943 10:46 2.36 103  
944 10:48 2.46 108  
945 10:50 2.55 93  
946 10:53 2.65 92  
947 10:57 2.87 94 Stream
948 12:39 2.90 78 Stream
949 11:07 3.18 94  
950 11:11 3.28 88  
951 11:15 3.46 81  
952 11:17 3.57 80  
953 11:20 3.90 66 ridgeline
954 11:26 3.99 38  
955 11:27 4.04 47  
956 11:33 4.19 42  
957 11:38 4.29 32 Rio Cedral
958 11:43 4.55 27  
959 11:47 4.68 45 Rio Sirena
960 11:50 4.75 36  
961 11:52 4.85 22  
962 12:01 5.31 32 Rio Sirena
963 12:15 5.80 43  
964 12:21 6.14 22  
965 12:33 6.50 19  
966 12:38 6.76 -8  
967 12:43 7.07 23  
968 12:45 7.17 35  
969 12:49 7.31 -13  
970 12:54 7.56 13  
971 12:55 7.66 24  
972 13:00 7.85 -3  
973 13:07 8.09 32  
974 13:20 8.10 25  
975 13:29 8.54 10  
976 13:35 8.88 14  
977 13:37 9.01 16  
978 13:44 9.31 35  
979 13:50 9.53 30  
980 13:54 9.72 19  
981 14:00 10.04 20  
982 14:02 10.21 34  
983 14:06 10.25 29  
984 14:12 10.52 0  
985 14:13 10.65 22  
986 14:18 10.88 24  
987 14:21 11.04 23  
988 14:28 11.39 -2  
989 14:34 11.64 32  
990 14:39 11.91 8  
991 14:40 11.97 11  
992 14:50 12.00 9  
993 14:59 12.42 8 Rio Sirena
994 15:04 12.68 11 Rio Sirena
995 15:09 12.95 10 Rio Sirena
996 15:18 15.90 7 Rio Sirena
997     5 SIRENA RANGER STATION

More than any other, the Los Patos - Sirena trail is notorious for its mud during the rainy season.  Between the slogs through the lowland mud, swollen creeks and rivers, and the slippery surfaces of red-clay trails, this trail can take seven hours in the rainy season while five hours is reasonable in the dry season.

The rangers require that hikers reach the Los Patos station by ten a.m. to be allowed to proceed the same day to Sirena.  Hikers with guides are allowed until eleven a.m. to arrive at Los Patos.  For those seeking to reach Sirena through Los Patos from Puerto Jimenez or La Palma, it means getting started from Guadalupe no later than seven on horses or six on foot, or by eight for those able to drive right to the Los Patos trailhead.

The Sirena River is only thigh high at its deepest at any of the crossings found on this trail.

            Guadalupe -->  Park Boundary                                   Pictures

            Park Boundary -->  Los Patos                                      Pictures

            Los Patos -->  Sirena                                                    Pictures

            Sirena --> San Pedrillo                                                 Pictures

            Sirena Area Trails                                                         Pictures

            Sirena --> La Leona                                                      Pictures

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