Boston Marathon logo
BOSTON MARATHON 2023

Jon Chesto

Bib: 1203•M

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 9%
Gender (Male)
#0 / 15176
Top 15%
Masters (Masters Men)
#0 / 9891
Top 5%
Division (M50-54)
#0 / 2052
Top 2%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:30
Rank: #1367
Start → 5K
19:30 | 6:17/mi
10K· 6.21 mi
38:27
Rank: #1166 (+201)
5K → 10K
18:57 | 6:06/mi
15K· 9.32 mi
57:35
Rank: #1148 (+18)
10K → 15K
19:08 | 6:10/mi
20K· 12.43 mi
1:16:56
Rank: #1131 (+17)
15K → 20K
19:21 | 6:14/mi
Half· 13.11 mi
1:21:09
Rank: #1140 (-9)
20K → Half
4:13 | 6:11/mi
25K· 15.53 mi
1:36:28
Rank: #1158 (-18)
Half → 25K
15:19 | 6:19/mi
30K· 18.64 mi
1:57:02
Rank: #1256 (-98)
25K → 30K
20:34 | 6:37/mi
20M
2:06:11
Rank: #1330 (-74)
30K → 20M
9:09 | 6:44/mi
21M
2:13:26
Rank: #1395 (-65)
20M → 21M
7:15 | 7:15/mi
35K· 21.75 mi
2:18:46
Rank: #1503 (-108)
21M → 35K
5:20 | 7:08/mi
23M
2:27:53
Rank: #1643 (-140)
35K → 23M
9:07 | 7:17/mi
24M
2:35:26
Rank: #1828 (-185)
23M → 24M
7:33 | 7:33/mi
40K· 24.85 mi
2:42:23
Rank: #2039 (-211)
24M → 40K
6:57 | 8:08/mi
25.2M
2:45:29
Rank: #2160 (-121)
40K → 25.2M
3:06 | 8:59/mi
Finish· 26.22 mi
2:53:15
Rank: #2320 (-160)
25.2M → Finish
7:46 | 7:37/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:21:09
Pace6:11 /mi
2nd Half
Distance13.11 mi
Time1:32:06
Pace7:02 /mi
📊Positive Split: 13.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:0619:306:1719:30
6:17
-
10K
6.21 mi10:39:0338:276:1118:57
6:06
-0:11
15K
9.32 mi10:58:1157:356:1119:08
6:10
+0:04
20K
12.43 mi11:17:321:16:566:1119:21
6:14
+0:04
Half
13.11 mi11:21:451:21:096:114:13
6:11
-0:03
25K
15.53 mi11:37:041:36:286:1315:19
6:19
+0:08
30K
18.64 mi11:57:381:57:026:1720:34
6:37
+0:18
20M
20.00 mi12:06:472:06:116:199:09
6:44
+0:07
21M
21.00 mi12:14:022:13:266:217:15
7:15
+0:31
35K
21.75 mi12:19:222:18:466:235:20
7:08
-0:07
23M
23.00 mi12:28:292:27:536:269:07
7:17
+0:09
24M
24.00 mi12:36:022:35:266:297:33
7:33
+0:16
40K
24.85 mi12:42:592:42:236:326:57
8:08
+0:35
25.2M
25.20 mi12:46:052:45:296:343:06
8:59
+0:51
Finish
26.22 mi12:53:512:53:156:377:46
7:37
-1:22

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

6:06 /mi

Average Pace

6:37 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:28

56% of race

Time at Steady Pace

35:03

20% of race

Time at Slower Pace

41:44

24% of race

Average Pace: 6:36 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:20:0619:306:1719:30
6:17
#1367
10K
6.21 mi10:39:0338:276:1118:57
6:06
#1166
15K
9.32 mi10:58:1157:356:1119:08
6:10
#1148
20K
12.43 mi11:17:321:16:566:1119:21
6:14
#1131
Half
13.11 mi11:21:451:21:096:114:13
6:11
#1140
25K
15.53 mi11:37:041:36:286:1315:19
6:19
#1158
30K
18.64 mi11:57:381:57:026:1720:34
6:37
#1256
20M
20.00 mi12:06:472:06:116:199:09
6:44
#1330
21M
21.00 mi12:14:022:13:266:217:15
7:15
#1395
35K
21.75 mi12:19:222:18:466:235:20
7:08
#1503
23M
23.00 mi12:28:292:27:536:269:07
7:17
#1643
24M
24.00 mi12:36:022:35:266:297:33
7:33
#1828
40K
24.85 mi12:42:592:42:236:326:57
8:08
#2039
25.2M
25.20 mi12:46:052:45:296:343:06
8:59
#2160
Finish
26.22 mi12:53:512:53:156:377:46
7:37
#2320
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi1367129912991128(Top 4%)1075(Top 7%)1075(Top 52%)
10K6.21 mi3.10 mi1166+2011103+1961103+1961060(Top 4%)1007(Top 7%)1007(Top 49%)
15K9.32 mi3.11 mi1148+181088+151088+151128(Top 4%)1075(Top 7%)1075(Top 52%)
20K12.43 mi3.11 mi1131+171076+121076+121139(Top 4%)1087(Top 7%)1087(Top 53%)
Half13.11 mi0.68 mi1140-91085-91085-91322(Top 5%)1270(Top 8%)1270(Top 62%)
25K15.53 mi2.42 mi1158-181103-181103-181407(Top 5%)1344(Top 9%)1344(Top 65%)
30K18.64 mi3.11 mi1256-981201-981201-982047(Top 8%)1956(Top 13%)1956(Top 95%)
20M20.00 mi1.36 mi1330-741271-701271-702424(Top 9%)2299(Top 15%)2299(Top 112%)
21M21.00 mi1.00 mi1395-651332-611332-613326(Top 12%)3096(Top 20%)3096(Top 151%)
35K21.75 mi0.75 mi1503-1081436-1041436-1046021(Top 23%)5229(Top 34%)5229(Top 255%)
23M23.00 mi1.25 mi1643-1401572-1361572-1365183(Top 19%)4591(Top 30%)4591(Top 224%)
24M24.00 mi1.00 mi1828-1851748-1761748-1767986(Top 30%)6294(Top 41%)6294(Top 307%)
40K24.85 mi0.85 mi2039-2111955-2071955-20710836(Top 41%)7743(Top 51%)7743(Top 377%)
25.2M25.20 mi0.35 mi2160-1212073-1182073-11812315(Top 46%)8378(Top 55%)8378(Top 408%)
Finish26.22 mi1.02 mi2320-1602221-1482221-1489363(Top 35%)6932(Top 46%)6932(Top 338%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1128

Males

1075

M50-54

1075

5K→10K

3.1 - 6.2 mi

Top 4%
×5stories
+79ft-138ft

Overall

1060

Males

1007

M50-54

1007

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1128

Males

1075

M50-54

1075

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

1139

Males

1087

M50-54

1087

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1322

Males

1270

M50-54

1270

Half→25K

13.1 - 15.5 mi

Top 5%
×4stories
+66ft-88ft

Overall

1407

Males

1344

M50-54

1344

25K→30K

15.5 - 18.6 mi

Top 8%
×9stories
+181ft-148ft

Overall

2047

Males

1956

M50-54

1956

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2424

Males

2299

M50-54

2299

20M→21M

20.0 - 21.0 mi

Top 12%
×8stories
+106ft-24ft

Overall

3326

Males

3096

M50-54

3096

21M→35K

21.0 - 21.8 mi

Top 23%
×7stories
+17ft-86ft

Overall

6021

Males

5229

M50-54

5229

35K→23M

21.8 - 23.0 mi

Top 19%
×5stories
+23ft-63ft

Overall

5183

Males

4591

M50-54

4591

23M→24M

23.0 - 24.0 mi

Top 30%
×6stories
+12ft-82ft

Overall

7986

Males

6294

M50-54

6294

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

10836

Males

7743

M50-54

7743

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12315

Males

8378

M50-54

8378

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2stories
+22ft-21ft

Overall

9363

Males

6932

M50-54

6932

Passing Analysis

Category:
Athletes Passed
366
Passed By
1319
Net Change
-953
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1367
5K → 10K21413+201#1367#1166
10K → 15K4022+18#1166#1148
15K → 20K4124+17#1148#1131
20K → Half312-9#1131#1140
Half → 25K2139-18#1140#1158
25K → 30K18116-98#1158#1256
30K → 20M983-74#1256#1330
20M → 21M772-65#1330#1395
21M → 35K2110-108#1395#1503
35K → 23M4144-140#1503#1643
23M → 24M2187-185#1643#1828
24M → 40K3214-211#1828#2039
40K → 25.2M0121-121#2039#2160
25.2M → Finish2162-160#2160#2320
TOTALS3661319-953
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing