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Ontario County High Points

Showing Zoë Marschner's first ascent dates for climbed peaks (11 out of 51, or 21.57%)

RankCountyPeak Elev-M Range (Level 4)AscentsAscent Date
1.Sudbury DistrictIshpatina Ridge693Northern Ontario562021-08-29
2.Thunder BayTower Mountain679Northern Ontario8 
3.TimiskamingIshpatina Ridge North677Northern Ontario7 
4.AlgomaOgidaki Mountain665Northern Ontario6 
5.NipissingSouthern Ontario High Point578Southern Ontario11 
6.HaliburtonManitou Mountain563Southern Ontario9 
7.KenoraKenora District High Point559Northern Ontario4 
8.GreyGrey County High Point544Southern Ontario162021-06-20 a
8.SimcoeNiagara Escarpment High Point544Southern Ontario16 
8.Rainy RiverRainy River District High Point544Northern Ontario2 
11.DufferinDufferin County High Point542Southern Ontario152021-06-20 b
11.HastingsHastings County High Point542Southern Ontario6 
11.MuskokaMuskoka High Point542Southern Ontario8 
14.Parry SoundParry Sound High Point532Southern Ontario7 
15.RenfrewRyans Mountain523Southern Ontario14 
16.WellingtonLuther Benchmark511Southern Ontario11 
17.Sudbury CityWolf Lake Mountain504Northern Ontario8 
18.Lennox and AddingtonMoger Pond Peak501Southern Ontario7 
19.PeelPeel High Point494Southern Ontario92021-08-21
20.CochraneGhost Range Peak488Northern Ontario9 
21.WaterlooWaterloo High Point438Southern Ontario9 
22.PeterboroughPeterborough County High Point434Southern Ontario82021-07-10 a
23.PerthPerth County High Point427Southern Ontario10 
24.FrontenacEvergreen Mountain417Southern Ontario8 
25.HaltonHalton High Point414Southern Ontario172021-06-20 c
26.DurhamDurham High Point410Southern Ontario14 
27.BruceBruce County High Point403Southern Ontario9 
28.HuronHuron County High Point397Southern Ontario9 
28.Kawartha LakesKawartha Lakes High Point397Southern Ontario132021-07-10 b
30.OxfordOxford County High Point391Southern Ontario14 
31.LanarkWhite Mountain386Southern Ontario9 
32.YorkYork High Point379Southern Ontario14 
33.NorthumberlandNorthumberland County High Point356Southern Ontario7 
34.ManitoulinCup and Saucer352Southern Ontario28 
35.MiddlesexMiddlesex County High Point342Southern Ontario12 
36.HamiltonHamilton High Point330Southern Ontario82021-06-27 b
37.BrantBrant County High Point327Southern Ontario5 
38.ElginElgin County High Point296Southern Ontario7 
39.NorfolkNorfolk County High Point278Southern Ontario6 
40.BrantfordBrantford High Point267Southern Ontario11 
41.LambtonLambton County High Point264Southern Ontario10 
42.NiagaraNiagara High Point259Southern Ontario212021-05-31
43.Chatham-KentChatham-Kent High Point233Southern Ontario8 
44.HaldimandHaldimand County High Point231Southern Ontario82021-06-27 a
45.EssexEssex County High Point228Southern Ontario6 
46.Leeds and GrenvilleLeeds and Grenville High Point212Southern Ontario9 
46.TorontoToronto High Point212Southern Ontario302021-06-18
48.OttawaOttawa High Point166Southern Ontario13 
49.Prince EdwardEast Picton Bay Hill155Southern Ontario13 
50.Stormont, Dundas and GlengarryStormont-Dundas-Glengarry High Point125Southern Ontario9 
51.Prescott and RussellVankleek Hill123Southern Ontario22 

Front Runners List: Click to see list completion progress by climbers that log their climbs using

Multiple Ascents Grid: Click for a grid showing all of Zoë Marschner's ascents of peaks on this list (including up to 10 rounds of repeats).

Compare Climbers: Click to compare ascents of up to 5 climbers working on this list.

List Description

Ontario is administratively divided into 51 units that are a mixture of counties, unified counties, regional municipalities, districts, cities, and municipalities. Most of them were historically counties at one point, and despite changes in name or status, the boundaries have remained mostly stable over the years.

These units also correspond to the Canadian Census Divisions for the most part. Since the last revision of Census Divisions in 2001, the combined county of Haldimand-Norfolk split into Haldimand County and Norfolk County, and the City of Brantford separated from Brant County. That is why there are 51 entiries on this list, while the Census lists only 49 Divisions.


The main source for the Ontario county high point list was the excellent Ontario Basic Mapping database system created by the provincial government, which is a huge improvement over the old NTS 1:50,000 map sheets. To help generate this list, all the spot elevations (over 500,000 of them) in the OBM data were downloaded, matched to their county by a point-in-polygon operation, and the highest spot elevations picked out. Sometimes there was a swarm of spot elevations of the same height in the same general location, and one represenative point was picked. In other cases, separate areas were logged (see, for example, Chatham-Kent). Also, some OBM spot elevations were clearly erroneous outliers and had to be discarded. In general, though, a 1-meter difference in spot elevations was considered significant, and these lower points were not considered high-point candidates.

Once a set of county high points was generated, they were cross-checked with the 1:50,000 NTS maps, and some were adjusted a little bit based on information there. The result should be a reasonably accurate guide to the highest ground in the counties. Before tackling any county, though, be sure to check the OBM and NTS maps yourself to familiarlize yourself with the area. You may have to check out several nearby areas to be sure of locating the highest piece of earth, an occupational hazard of highpointers in relatively flat terrain like Ontario.


     Ontario Basic Mapping


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