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BOSTON MARATHON 2023

Rob Kelsey

Bib: 9798•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 25%
Gender (Male)
#0 / 15176
Top 38%
Masters (Masters Men)
#0 / 9891
Top 24%
Division (M45-49)
#0 / 2252
Top 31%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:30
Rank: #10169
Start → 5K
23:30 | 7:34/mi
10K· 6.21 mi
46:31
Rank: #9882 (+287)
5K → 10K
23:01 | 7:25/mi
15K· 9.32 mi
1:09:28
Rank: #9632 (+250)
10K → 15K
22:57 | 7:23/mi
20K· 12.43 mi
1:32:40
Rank: #9456 (+176)
15K → 20K
23:12 | 7:28/mi
Half· 13.11 mi
1:37:42
Rank: #9442 (+14)
20K → Half
5:02 | 7:23/mi
25K· 15.53 mi
1:55:39
Rank: #9166 (+276)
Half → 25K
17:57 | 7:24/mi
30K· 18.64 mi
2:18:39
Rank: #8662 (+504)
25K → 30K
23:00 | 7:24/mi
20M
2:28:27
Rank: #8332 (+330)
30K → 20M
9:48 | 7:13/mi
21M
2:35:45
Rank: #8001 (+331)
20M → 21M
7:18 | 7:18/mi
35K· 21.75 mi
2:40:33
Rank: #7710 (+291)
21M → 35K
4:48 | 6:25/mi
23M
2:49:05
Rank: #7348 (+362)
35K → 23M
8:32 | 6:49/mi
24M
2:55:43
Rank: #7094 (+254)
23M → 24M
6:38 | 6:38/mi
40K· 24.85 mi
3:01:22
Rank: #6832 (+262)
24M → 40K
5:39 | 6:36/mi
25.2M
3:03:54
Rank: #6743 (+89)
40K → 25.2M
2:32 | 7:21/mi
Finish· 26.22 mi
3:10:44
Rank: #6579 (+164)
25.2M → Finish
6:50 | 6:42/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:37:42
Pace7:27 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:33:02
Pace7:06 /mi
📊Negative Split: 4.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:2723:307:3423:30
7:34
-
10K
6.21 mi11:12:2846:317:2923:01
7:25
-0:09
15K
9.32 mi11:35:251:09:287:2722:57
7:23
-0:02
20K
12.43 mi11:58:371:32:407:2723:12
7:28
+0:05
Half
13.11 mi12:03:391:37:427:275:02
7:23
-0:05
25K
15.53 mi12:21:361:55:397:2717:57
7:24
+0:01
30K
18.64 mi12:44:362:18:397:2623:00
7:24
0:00
20M
20.00 mi12:54:242:28:277:259:48
7:13
-0:11
21M
21.00 mi13:01:422:35:457:257:18
7:18
+0:05
35K
21.75 mi13:06:302:40:337:234:48
6:25
-0:53
23M
23.00 mi13:15:022:49:057:218:32
6:49
+0:24
24M
24.00 mi13:21:402:55:437:196:38
6:38
-0:11
40K
24.85 mi13:27:193:01:227:185:39
6:36
-0:02
25.2M
25.20 mi13:29:513:03:547:182:32
7:21
+0:45
Finish
26.22 mi13:36:413:10:447:176:50
6:42
-0:39

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

6:25 /mi

Average Pace

7:17 /mi

Slowest Pace

7:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

32:27

17% of race

Time at Steady Pace

2:38:17

83% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:16 /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 mi10:49:2723:307:3423:30
7:34
#10169
10K
6.21 mi11:12:2846:317:2923:01
7:25
#9882
15K
9.32 mi11:35:251:09:287:2722:57
7:23
#9632
20K
12.43 mi11:58:371:32:407:2723:12
7:28
#9456
Half
13.11 mi12:03:391:37:427:275:02
7:23
#9442
25K
15.53 mi12:21:361:55:397:2717:57
7:24
#9166
30K
18.64 mi12:44:362:18:397:2623:00
7:24
#8662
20M
20.00 mi12:54:242:28:277:259:48
7:13
#8332
21M
21.00 mi13:01:422:35:457:257:18
7:18
#8001
35K
21.75 mi13:06:302:40:337:234:48
6:25
#7710
23M
23.00 mi13:15:022:49:057:218:32
6:49
#7348
24M
24.00 mi13:21:402:55:437:196:38
6:38
#7094
40K
24.85 mi13:27:193:01:227:185:39
6:36
#6832
25.2M
25.20 mi13:29:513:03:547:182:32
7:21
#6743
Finish
26.22 mi13:36:413:10:447:176:50
6:42
#6579
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi10169820982099207(Top 35%)7668(Top 51%)7668(Top 340%)
10K6.21 mi3.10 mi9882+2878083+1268083+1269676(Top 36%)7972(Top 53%)7972(Top 354%)
15K9.32 mi3.11 mi9632+2507943+1407943+1409207(Top 35%)7668(Top 51%)7668(Top 340%)
20K12.43 mi3.11 mi9456+1767827+1167827+1169033(Top 34%)7514(Top 50%)7514(Top 334%)
Half13.11 mi0.68 mi9442+147820+77820+79134(Top 34%)7569(Top 50%)7569(Top 336%)
25K15.53 mi2.42 mi9166+2767647+1737647+1738030(Top 30%)6815(Top 45%)6815(Top 303%)
30K18.64 mi3.11 mi8662+5047290+3577290+3576615(Top 25%)5811(Top 38%)5811(Top 258%)
20M20.00 mi1.36 mi8332+3307057+2337057+2335180(Top 19%)4687(Top 31%)4687(Top 208%)
21M21.00 mi1.00 mi8001+3316843+2146843+2143635(Top 14%)3375(Top 22%)3375(Top 150%)
35K21.75 mi0.75 mi7710+2916648+1956648+1952071(Top 8%)1969(Top 13%)1969(Top 87%)
23M23.00 mi1.25 mi7348+3626378+2706378+2702766(Top 10%)2592(Top 17%)2592(Top 115%)
24M24.00 mi1.00 mi7094+2546197+1816197+1812787(Top 10%)2596(Top 17%)2596(Top 115%)
40K24.85 mi0.85 mi6832+2625997+2005997+2001974(Top 7%)1856(Top 12%)1856(Top 82%)
25.2M25.20 mi0.35 mi6743+895929+685929+683235(Top 12%)2958(Top 19%)2958(Top 131%)
Finish26.22 mi1.02 mi6579+1645802+1275802+1273570(Top 13%)3195(Top 21%)3195(Top 142%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9207

Males

7668

M45-49

7668

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

9676

Males

7972

M45-49

7972

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9207

Males

7668

M45-49

7668

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9033

Males

7514

M45-49

7514

20K→Half

12.4 - 13.1 mi

Top 34%
×2stories
+19ft-37ft

Overall

9134

Males

7569

M45-49

7569

Half→25K

13.1 - 15.5 mi

Top 30%
×4stories
+66ft-88ft

Overall

8030

Males

6815

M45-49

6815

25K→30K

15.5 - 18.6 mi

Top 25%
×9stories
+181ft-148ft

Overall

6615

Males

5811

M45-49

5811

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5180

Males

4687

M45-49

4687

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3635

Males

3375

M45-49

3375

21M→35K

21.0 - 21.8 mi

Top 8%
×7stories
+17ft-86ft

Overall

2071

Males

1969

M45-49

1969

35K→23M

21.8 - 23.0 mi

Top 10%
×5stories
+23ft-63ft

Overall

2766

Males

2592

M45-49

2592

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2787

Males

2596

M45-49

2596

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

1974

Males

1856

M45-49

1856

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3235

Males

2958

M45-49

2958

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2stories
+22ft-21ft

Overall

3570

Males

3195

M45-49

3195

Passing Analysis

Category:
Athletes Passed
3947*
Passed By
357
Net Change
+3590
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10169
5K → 10K471*184+287#10169#9882
10K → 15K32878+250#9882#9632
15K → 20K23054+176#9632#9456
20K → Half2915+14#9456#9442
Half → 25K2837+276#9442#9166
25K → 30K51612+504#9166#8662
30K → 20M3344+330#8662#8332
20M → 21M3310+331#8332#8001
21M → 35K2910+291#8001#7710
35K → 23M3620+362#7710#7348
23M → 24M2540+254#7348#7094
24M → 40K2620+262#7094#6832
40K → 25.2M912+89#6832#6743
25.2M → Finish1651+164#6743#6579
TOTALS3947*357+3590

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing