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Ontario County High Points

Showing Serge Massad's first ascent dates for climbed peaks (47 out of 51, or 92.16%)

RankCountyPeak Elev-M Range (Level 4)Ascent Date
1.Sudbury DistrictIshpatina Ridge693Northern Ontario2017-09-17
2.Thunder BayTower Mountain679Northern Ontario 
3.TimiskamingIshpatina Ridge North677Northern Ontario2017-09-17 b
4.AlgomaOgidaki Mountain665Northern Ontario 
5.NipissingSouthern Ontario High Point578Southern Ontario2016-09-18 a
6.HaliburtonManitou Mountain563Southern Ontario2016-09-17 b
7.KenoraKenora District High Point559Northern Ontario 
8.GreyGrey County High Point544Southern Ontario2016-10-22 d
8.SimcoeNiagara Escarpment High Point544Southern Ontario2016-10-22 b
8.Rainy RiverRainy River District High Point544Northern Ontario 
11.DufferinDufferin County High Point542Southern Ontario2016-10-22 e
11.HastingsHastings County High Point542Southern Ontario2016-09-17 b
11.MuskokaMuskoka High Point542Southern Ontario2016-09-16
14.Parry SoundParry Sound High Point532Southern Ontario2016-08-13
15.RenfrewRyans Mountain523Southern Ontario2016-08-20
16.WellingtonLuther Benchmark511Southern Ontario2016-10-22 g
17.Sudbury CityWolf Lake Mountain504Northern Ontario2016-10-22 a
18.Lennox and AddingtonMoger Pond Peak501Southern Ontario2016-08-20
19.PeelPeel High Point494Southern Ontario2016-10-23 a
20.CochraneGhost Range Peak488Northern Ontario2016-03-05
21.WaterlooWaterloo High Point438Southern Ontario2017-02-04 a
22.PeterboroughPeterborough County High Point434Southern Ontario2016-09-18 b
23.PerthPerth County High Point427Southern Ontario2017-02-04 b
24.FrontenacEvergreen Mountain417Southern Ontario2016-08-20
25.HaltonHalton High Point414Southern Ontario2017-02-03 b
26.DurhamDurham High Point410Southern Ontario2016-10-23 c
27.BruceBruce County High Point403Southern Ontario2016-10-22 h
28.HuronHuron County High Point397Southern Ontario2016-10-22 f
28.Kawartha LakesKawartha Lakes High Point397Southern Ontario2016-10-23 d
30.OxfordOxford County High Point391Southern Ontario2017-02-04 c
31.LanarkWhite Mountain386Southern Ontario2016-04-29
32.YorkYork High Point379Southern Ontario2016-10-23 b
33.NorthumberlandNorthumberland County High Point356Southern Ontario2016-10-23 e
34.ManitoulinCup and Saucer352Southern Ontario2015-09-06
35.MiddlesexMiddlesex County High Point342Southern Ontario2017-02-04 d
36.BrantBrant County High Point327Southern Ontario2017-02-05 c
37.HamiltonHamilton High Point324Southern Ontario2017-02-05 d
38.ElginElgin County High Point296Southern Ontario2017-02-04 i
39.NorfolkNorfolk County High Point278Southern Ontario2017-02-04 j
40.BrantfordBrantford High Point267Southern Ontario2017-02-05 b
41.LambtonLambton County High Point264Southern Ontario2017-02-04 e
42.NiagaraNiagara High Point259Southern Ontario2017-02-04 l
43.Chatham-KentChatham-Kent High Point233Southern Ontario2017-02-04 f
43.EssexEssex County High Point233Southern Ontario2017-02-04 g
45.HaldimandHaldimand County High Point231Southern Ontario2017-02-04 k
46.Leeds and GrenvilleLeeds and Grenville High Point212Southern Ontario2014-09-28
46.TorontoToronto High Point212Southern Ontario2017-02-03 a
48.OttawaOttawa High Point166Southern Ontario2016-04-29
49.Prince EdwardEast Picton Bay Hill155Southern Ontario2014-09-27
50.Stormont, Dundas and GlengarryStormont-Dundas-Glengarry High Point125Southern Ontario2014-09-27
51.Prescott and RussellVankleek Hill123Southern Ontario2014-09-28

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

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

Compare Climbers: Click here 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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