{"name":"Grand Haven State Game Area","slug":"grand-haven-state-game-area","river_id":null,"basis":"public-land","bbox":[-86.18424,43.0256,-86.11152,43.05634],"generated_at":"2026-09-22T23:27:47Z","breaks":[58,64,70],"thermal":{"Cold":{"color":"#0f6e56","dark":"#3f9b7f"},"Cold-transitional":{"color":"#3d7c9c","dark":"#6aa6c4"},"Cool":{"color":"#c98a3b","dark":"#d9a256"},"Warm":{"color":"#a94b32","dark":"#c46a4f"},"Unknown":{"color":"#9a9384","dark":"#7c766a"}},"sites":[],"river":{"type":"FeatureCollection","features":[{"type":"Feature","properties":{"july_class":"Warm","stream_id":"grand-river"},"geometry":{"type":"MultiLineString","coordinates":[[[-86.20955,43.07284000000001],[-86.21543,43.07426000000004]],[[-86.16102,43.04343],[-86.16014,43.045430000000046]],[[-86.1443,43.03216],[-86.14417,43.03045],[-86.14806,43.02589999999995]],[[-86.14806,43.02589999999995],[-86.15141,43.02514000000001],[-86.15493,43.026130000000045]],[[-86.16634,43.05429000000003],[-86.1666,43.05442999999998]],[[-86.1666,43.05442999999998],[-86.17259,43.05691999999999],[-86.18545,43.06020000000004],[-86.19105000000002,43.06052999999998],[-86.20188,43.064330000000005]],[[-86.23238000000002,43.07671999999998],[-86.23603,43.072789999999976],[-86.23516,43.067150000000005]],[[-86.2196,43.07584000000005],[-86.22464,43.077420000000004],[-86.23238000000002,43.07671999999998]],[[-86.21543,43.07426000000004],[-86.2196,43.07584000000005]],[[-86.12911,43.041749999999965],[-86.13575,43.040570000000045],[-86.13988,43.03859000000002],[-86.14234,43.03653999999999],[-86.1443,43.03216]],[[-86.16014,43.045430000000046],[-86.16055,43.05024000000005],[-86.16634,43.05429000000003]],[[-86.0794,43.04128],[-86.08936,43.04007999999996],[-86.10191,43.040380000000034],[-86.11165,43.039519999999946],[-86.12911,43.041749999999965]],[[-86.15493,43.026130000000045],[-86.15941,43.03185999999999]],[[-86.20188,43.064330000000005],[-86.20271,43.06819000000001]],[[-86.23516,43.067150000000005],[-86.23726,43.06267000000001],[-86.24406013728246,43.05969913819258]],[[-86.15941,43.03185999999999],[-86.16173,43.036199999999994],[-86.16213,43.04007],[-86.16102,43.04343]],[[-86.06620000000001,43.04060000000001],[-86.07261000000001,43.04169000000004],[-86.0794,43.04128]],[[-86.05269736668797,43.034731413553004],[-86.06620000000001,43.04060000000001]],[[-86.20271,43.06819000000001],[-86.20731,43.06890999999995]],[[-86.20731,43.06890999999995],[-86.20902,43.07017999999997],[-86.20955,43.07284000000001]]]}},{"type":"Feature","properties":{"july_class":"Unknown","stream_id":"bruce-bayou"},"geometry":{"type":"MultiLineString","coordinates":[[[-86.10425,43.04605999999999],[-86.10896,43.04462],[-86.11281,43.04497]],[[-86.11281,43.04497],[-86.11967,43.04449999999999]],[[-86.11967,43.04449999999999],[-86.12693,43.04347999999999],[-86.12911,43.041749999999965]]]}},{"type":"Feature","properties":{"july_class":"Cold-transitional","stream_id":"robinson-bayou"},"geometry":{"type":"MultiLineString","coordinates":[[[-86.11456,43.03289999999997],[-86.12455,43.03477000000001],[-86.13038,43.03681999999999],[-86.1324,43.035629999999955],[-86.13589,43.03558999999999],[-86.13876,43.02856999999998]],[[-86.07233,42.99707000000005],[-86.07193,43.003040000000006],[-86.0754,43.00460000000002],[-86.08194,43.01050999999997],[-86.08224,43.01383000000004],[-86.08409,43.01538999999998],[-86.08292,43.019120000000015],[-86.08467,43.01963999999997],[-86.08702,43.02299000000002],[-86.08738,43.02585999999999],[-86.0904,43.02911000000002],[-86.08986,43.030820000000006]],[[-86.08986,43.030820000000006],[-86.0918,43.03102999999997],[-86.09721000000002,43.029090000000025],[-86.09996,43.029520000000026],[-86.10521,43.032210000000006],[-86.10791,43.031890000000026],[-86.11456,43.03289999999997]],[[-86.13876,43.02856999999998],[-86.14366000000001,43.025920000000006],[-86.14692,43.025279999999995]],[[-86.14692,43.025279999999995],[-86.14806,43.02589999999995]]]}},{"type":"Feature","properties":{"july_class":"Cold-transitional","stream_id":"stearns-bayou"},"geometry":{"type":"MultiLineString","coordinates":[[[-86.11218,43.012860000000025],[-86.11641,43.014889999999994],[-86.11604,43.01724999999999],[-86.12021,43.016389999999994],[-86.12354,43.01921000000001],[-86.1266,43.01892999999998],[-86.12691,43.020499999999956],[-86.13155,43.02172]],[[-86.13155,43.02172],[-86.13539,43.02502],[-86.13762,43.02565]],[[-86.10997,43.012510000000034],[-86.11218,43.012860000000025]],[[-86.13762,43.02565],[-86.13876,43.02856999999998]]]}},{"type":"Feature","properties":{"july_class":"Unknown","stream_id":"lost-channel"},"geometry":{"type":"LineString","coordinates":[[-86.16102,43.04343],[-86.16239,43.04371000000001],[-86.16334,43.04614000000002],[-86.16713,43.04830000000001],[-86.17212,43.05317000000005],[-86.17675,43.05280999999998],[-86.19343,43.05686]]}}]},"land":{"type":"FeatureCollection","features":[{"type":"Feature","properties":{"name":"Grand Haven State Game Area","owner":"Michigan DNR","subject":true},"geometry":{"type":"MultiPolygon","coordinates":[[[[-86.128534,43.04220300000006],[-86.120531,43.046227],[-86.115536,43.04582400000003],[-86.114122,43.046839000000034],[-86.11152,43.046513000000026],[-86.11631,43.04067700000006],[-86.128534,43.04220300000006]]],[[[-86.115149,43.048338],[-86.115693,43.04713099999996],[-86.117183,43.04687],[-86.116457,43.04832],[-86.115149,43.048338]]],[[[-86.146757,43.02633300000001],[-86.1432,43.03046100000007],[-86.141826,43.035220999999986],[-86.138002,43.03859000000002],[-86.13987,43.038206],[-86.137846,43.03944999999999],[-86.132381,43.04027100000002],[-86.134126,43.03755299999995],[-86.126196,43.037537],[-86.12417,43.03542999999999],[-86.116503,43.034050000000036],[-86.136703,43.033539000000026],[-86.139812,43.02810800000005],[-86.143614,43.02599500000003],[-86.147046,43.025603000000004],[-86.145812,43.02653399999997],[-86.146757,43.02633300000001]],[[-86.136703,43.033539000000026],[-86.136018,43.034071],[-86.136043,43.03456700000001],[-86.136703,43.033539000000026]]],[[[-86.132381,43.04027100000002],[-86.129966,43.040722000000045],[-86.12299,43.039611],[-86.132381,43.04027100000002]]],[[[-86.119507,43.03936600000004],[-86.117675,43.03674699999997],[-86.119468,43.03678100000002],[-86.119507,43.03936600000004]]],[[[-86.131675,43.04238399999999],[-86.126661,43.04431400000004],[-86.130336,43.04250200000003],[-86.131675,43.04238399999999]]],[[[-86.126661,43.04431400000004],[-86.126609,43.04809100000001],[-86.126479,43.04681699999999],[-86.121315,43.04689999999998],[-86.126661,43.04431400000004]]],[[[-86.155129,43.03729700000001],[-86.154202,43.03640999999999],[-86.153585,43.04209300000002],[-86.150867,43.04285699999999],[-86.144462,43.034485000000004],[-86.145801,43.03211899999999],[-86.147927,43.031441000000044],[-86.149513,43.031883999999955],[-86.154478,43.03553999999998],[-86.155129,43.03729700000001]]],[[[-86.161617,43.038952],[-86.159294,43.04448599999998],[-86.157024,43.043547000000025],[-86.15807,43.04071799999999],[-86.157052,43.03572899999999],[-86.149421,43.03086800000003],[-86.144936,43.03135800000001],[-86.148525,43.02691199999998],[-86.154883,43.026842000000045],[-86.161617,43.038952]]],[[[-86.155031,43.03762599999998],[-86.154825,43.03950600000002],[-86.154763,43.03755500000001],[-86.155031,43.03762599999998]]],[[[-86.157553,43.04071399999996],[-86.155836,43.04337600000005],[-86.156571,43.044064],[-86.155752,43.04356500000001],[-86.155328,43.042364999999975],[-86.156497,43.03761000000002],[-86.157553,43.04071399999996]]],[[[-86.171264,43.052489999999956],[-86.177854,43.05168700000003],[-86.180252,43.052735],[-86.174888,43.054045999999964],[-86.18423,43.055190999999986],[-86.179904,43.05634100000002],[-86.175162,43.05628199999997],[-86.168666,43.05449099999999],[-86.16139,43.04925400000004],[-86.161925,43.04484100000006],[-86.162945,43.04560099999996],[-86.162774,43.04483899999996],[-86.16408,43.044811999999965],[-86.16571300000001,43.04692599999997],[-86.164395,43.04668199999999],[-86.171264,43.052489999999956]]]]}},{"type":"Feature","properties":{"name":"Hofma Park & Preserve","owner":"City and township land"},"geometry":{"type":"Polygon","coordinates":[[[-86.172288,43.00857999999997],[-86.179828,43.008588],[-86.187452,43.019493],[-86.195014,43.015775000000026],[-86.195077,43.019439999999996],[-86.204974,43.01937900000004],[-86.205046,43.023072000000006],[-86.192581,43.02309699999999],[-86.192642,43.02629500000004],[-86.188868,43.023107999999986],[-86.175192,43.02313999999993],[-86.172288,43.00857999999997]]]}},{"type":"Feature","properties":{"name":"Hofma Preserve","owner":"Local Government land"},"geometry":{"type":"Polygon","coordinates":[[[-86.205062,43.023072000000006],[-86.192594,43.02316899999999],[-86.19268,43.02580499999996],[-86.176327,43.02299200000001],[-86.174052,43.02671300000003],[-86.179881,43.012175999999975],[-86.184858,43.01224200000006],[-86.18744,43.01930899999999],[-86.195159,43.01573500000003],[-86.195136,43.019493],[-86.204985,43.01941000000001],[-86.205062,43.023072000000006]]]}}]}}