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BOSTON MARATHON 2023

Todd Sellon

Bib: 12214•M

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 22%
Gender (Male)
#0 / 15176
Top 34%
Masters (Masters Men)
#0 / 9891
Top 20%
Division (M55-59)
#0 / 1422
Top 6%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:42/mi
23:54
↑ 97↓ 3451.5%
10K· 6.21 mi
7:05/mi
45:53
↑ 79↓ 1380.4%
15K· 9.32 mi
6:53/mi
1:07:17
↑ 67↓ 78
20K· 12.43 mi
7:19/mi
1:30:01
↑ 106↓ 860.1%
Half· 13.11 mi
6:55/mi
1:34:44
↑ 19↓ 370.5%
25K· 15.53 mi
7:04/mi
1:51:52
↑ 66↓ 880.2%
30K· 18.64 mi
6:59/mi
2:13:35
↑ 181↓ 1480.2%
20M
7:10/mi
2:23:20
↑ 64↓ 500.2%
21M
7:29/mi
2:30:49
↑ 106↓ 241.6%
35K· 21.75 mi
7:05/mi
2:36:07
↑ 17↓ 861.7%
23M
7:14/mi
2:45:10
↑ 23↓ 630.6%
24M
6:56/mi
2:52:06
↓ 821.3%
40K· 24.85 mi
6:59/mi
2:58:04
↓ 200.3%
25.2M
7:21/mi
3:00:36
↑ 13↓ 160.2%
Finish· 26.22 mi
6:35/mi
3:07:19
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:34:44
Pace7:14 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:32:35
Pace7:04 /mi
📊Negative Split: 2.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:0023:547:4223:54
7:42
-
10K
6.21 mi11:37:5945:537:2321:59
7:05
-0:37
15K
9.32 mi11:59:231:07:177:1321:24
6:53
-0:12
20K
12.43 mi12:22:071:30:017:1522:44
7:19
+0:26
Half
13.11 mi12:26:501:34:447:144:43
6:55
-0:24
25K
15.53 mi12:43:581:51:527:1217:08
7:04
+0:09
30K
18.64 mi13:05:412:13:357:1021:43
6:59
-0:05
20M
20.00 mi13:15:262:23:207:109:45
7:10
+0:11
21M
21.00 mi13:22:552:30:497:117:29
7:29
+0:19
35K
21.75 mi13:28:132:36:077:115:18
7:05
-0:24
23M
23.00 mi13:37:162:45:107:119:03
7:14
+0:09
24M
24.00 mi13:44:122:52:067:106:56
6:56
-0:18
40K
24.85 mi13:50:102:58:047:105:58
6:59
+0:03
25.2M
25.20 mi13:52:423:00:367:102:32
7:21
+0:22
Finish
26.22 mi13:59:253:07:197:096:43
6:35
-0:46

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

6:35 /mi

Average Pace

7:09 /mi

Slowest Pace

7:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:10:40

70% of race

Time at Steady Pace

56:39

30% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:09 /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 mi11:16:0023:547:4223:54
7:42
#11357
10K
6.21 mi11:37:5945:537:2321:59
7:05
#9047
15K
9.32 mi11:59:231:07:177:1321:24
6:53
#7882
20K
12.43 mi12:22:071:30:017:1522:44
7:19
#7850
Half
13.11 mi12:26:501:34:447:144:43
6:55
#7736
25K
15.53 mi12:43:581:51:527:1217:08
7:04
#7376
30K
18.64 mi13:05:412:13:357:1021:43
6:59
#6781
20M
20.00 mi13:15:262:23:207:109:45
7:10
#6626
21M
21.00 mi13:22:552:30:497:117:29
7:29
#6467
35K
21.75 mi13:28:132:36:077:115:18
7:05
#6414
23M
23.00 mi13:37:162:45:107:119:03
7:14
#6289
24M
24.00 mi13:44:122:52:067:106:56
6:56
#6135
40K
24.85 mi13:50:102:58:047:105:58
6:59
#6013
25.2M
25.20 mi13:52:423:00:367:102:32
7:21
#5950
Finish
26.22 mi13:59:253:07:197:096:43
6:35
#5776
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi11357882188215873(Top 22%)5361(Top 35%)5361(Top 377%)
10K6.21 mi3.10 mi9047+23107594+12277594+12277269(Top 27%)6425(Top 42%)6425(Top 452%)
15K9.32 mi3.11 mi7882+11656877+7176877+7175873(Top 22%)5361(Top 35%)5361(Top 377%)
20K12.43 mi3.11 mi7850+326841+366841+367893(Top 30%)6811(Top 45%)6811(Top 479%)
Half13.11 mi0.68 mi7736+1146763+786763+786053(Top 23%)5523(Top 36%)5523(Top 388%)
25K15.53 mi2.42 mi7376+3606511+2526511+2525929(Top 22%)5394(Top 36%)5394(Top 379%)
30K18.64 mi3.11 mi6781+5956050+4616050+4614294(Top 16%)3996(Top 26%)3996(Top 281%)
20M20.00 mi1.36 mi6626+1555918+1325918+1324996(Top 19%)4542(Top 30%)4542(Top 319%)
21M21.00 mi1.00 mi6467+1595788+1305788+1304509(Top 17%)4111(Top 27%)4111(Top 289%)
35K21.75 mi0.75 mi6414+535747+415747+415797(Top 22%)5087(Top 34%)5087(Top 358%)
23M23.00 mi1.25 mi6289+1255641+1065641+1064941(Top 19%)4424(Top 29%)4424(Top 311%)
24M24.00 mi1.00 mi6135+1545512+1295512+1294348(Top 16%)3940(Top 26%)3940(Top 277%)
40K24.85 mi0.85 mi6013+1225410+1025410+1023745(Top 14%)3386(Top 22%)3386(Top 238%)
25.2M25.20 mi0.35 mi5950+635356+545356+543224(Top 12%)2947(Top 19%)2947(Top 207%)
Finish26.22 mi1.02 mi5776+1745210+1465210+1462959(Top 11%)2684(Top 18%)2684(Top 189%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21story building
+97ft-345ft

Overall

5873

Males

5361

M55-59

5361

5K→10K

3.1 - 6.2 mi

Top 27%
×5story building
+79ft-138ft

Overall

7269

Males

6425

M55-59

6425

10K→15K

6.2 - 9.3 mi

Top 22%
×3story building
+67ft-78ft

Overall

5873

Males

5361

M55-59

5361

15K→20K

9.3 - 12.4 mi

Top 30%
×5story building
+106ft-86ft

Overall

7893

Males

6811

M55-59

6811

20K→Half

12.4 - 13.1 mi

Top 23%
×2story building
+19ft-37ft

Overall

6053

Males

5523

M55-59

5523

Half→25K

13.1 - 15.5 mi

Top 22%
×4story building
+66ft-88ft

Overall

5929

Males

5394

M55-59

5394

25K→30K

15.5 - 18.6 mi

Top 16%
×9story building
+181ft-148ft

Overall

4294

Males

3996

M55-59

3996

30K→20M

18.6 - 20.0 mi

Top 19%
×5story building
+64ft-50ft

Overall

4996

Males

4542

M55-59

4542

20M→21M

20.0 - 21.0 mi

Top 17%
×8story building
+106ft-24ft

Overall

4509

Males

4111

M55-59

4111

21M→35K

21.0 - 21.8 mi

Top 22%
×7story building
+17ft-86ft

Overall

5797

Males

5087

M55-59

5087

35K→23M

21.8 - 23.0 mi

Top 19%
×5story building
+23ft-63ft

Overall

4941

Males

4424

M55-59

4424

23M→24M

23.0 - 24.0 mi

Top 16%
×6story building
+12ft-82ft

Overall

4348

Males

3940

M55-59

3940

24M→40K

24.0 - 24.9 mi

Top 14%
×1story
+6ft-20ft

Overall

3745

Males

3386

M55-59

3386

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3224

Males

2947

M55-59

2947

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2story building
+22ft-21ft

Overall

2959

Males

2684

M55-59

2684

Passing Analysis

Category:
Athletes Passed
5731*
Passed By
150
Net Change
+5581
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11357
5K → 10K2316*6+2310#11357#9047
10K → 15K11650+1165#9047#7882
15K → 20K135103+32#7882#7850
20K → Half1140+114#7850#7736
Half → 25K3622+360#7736#7376
25K → 30K5961+595#7376#6781
30K → 20M1627+155#6781#6626
20M → 21M1645+159#6626#6467
21M → 35K6411+53#6467#6414
35K → 23M1338+125#6414#6289
23M → 24M1562+154#6289#6135
24M → 40K1253+122#6135#6013
40K → 25.2M641+63#6013#5950
25.2M → Finish1751+174#5950#5776
TOTALS5731*150+5581

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

📊

Passing Visuals

Category:
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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