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BOSTON MARATHON 2023

Jeffrey Iosa

Bib: 10269•M

FL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 20%
Gender (Male)
#0 / 15176
Top 33%
Masters (Masters Men)
#0 / 9891
Top 18%
Division (M45-49)
#0 / 2252
Top 22%
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
7:29/mi
23:15
↑ 97↓ 3451.5%
10K· 6.21 mi
7:02/mi
45:07
↑ 79↓ 1380.4%
15K· 9.32 mi
6:50/mi
1:06:20
↑ 67↓ 78
20K· 12.43 mi
6:57/mi
1:27:57
↑ 106↓ 860.1%
Half· 13.11 mi
6:47/mi
1:32:35
↑ 19↓ 370.5%
25K· 15.53 mi
6:49/mi
1:49:07
↑ 66↓ 880.2%
30K· 18.64 mi
7:02/mi
2:10:57
↑ 181↓ 1480.2%
20M
7:02/mi
2:20:30
↑ 64↓ 500.2%
21M
7:34/mi
2:28:04
↑ 106↓ 241.6%
35K· 21.75 mi
7:02/mi
2:33:20
↑ 17↓ 861.7%
23M
7:13/mi
2:42:22
↑ 23↓ 630.6%
24M
7:11/mi
2:49:33
↓ 821.3%
40K· 24.85 mi
7:20/mi
2:55:49
↓ 200.3%
25.2M
7:58/mi
2:58:34
↑ 13↓ 160.2%
Finish· 26.22 mi
7:05/mi
3:05:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:32:35
Pace7:04 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:33:12
Pace7:07 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:2023:157:2923:15
7:29
-
10K
6.21 mi11:11:1245:077:1621:52
7:02
-0:27
15K
9.32 mi11:32:251:06:207:0721:13
6:50
-0:12
20K
12.43 mi11:54:021:27:577:0521:37
6:57
+0:07
Half
13.11 mi11:58:401:32:357:044:38
6:47
-0:10
25K
15.53 mi12:15:121:49:077:0116:32
6:49
+0:02
30K
18.64 mi12:37:022:10:577:0121:50
7:02
+0:13
20M
20.00 mi12:46:352:20:307:019:33
7:02
0:00
21M
21.00 mi12:54:092:28:047:037:34
7:34
+0:32
35K
21.75 mi12:59:252:33:207:035:16
7:02
-0:32
23M
23.00 mi13:08:272:42:227:049:02
7:13
+0:11
24M
24.00 mi13:15:382:49:337:047:11
7:11
-0:02
40K
24.85 mi13:21:542:55:497:046:16
7:20
+0:09
25.2M
25.20 mi13:24:392:58:347:052:45
7:58
+0:38
Finish
26.22 mi13:31:523:05:477:057:13
7:05
-0:53

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

6:47 /mi

Average Pace

7:05 /mi

Slowest Pace

7:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:32:13

82% of race

Time at Steady Pace

33:34

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:05 /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 mi10:49:2023:157:2923:15
7:29
#9467
10K
6.21 mi11:11:1245:077:1621:52
7:02
#8183
15K
9.32 mi11:32:251:06:207:0721:13
6:50
#7211
20K
12.43 mi11:54:021:27:577:0521:37
6:57
#6788
Half
13.11 mi11:58:401:32:357:044:38
6:47
#6718
25K
15.53 mi12:15:121:49:077:0116:32
6:49
#6365
30K
18.64 mi12:37:022:10:577:0121:50
7:02
#5971
20M
20.00 mi12:46:352:20:307:019:33
7:02
#5797
21M
21.00 mi12:54:092:28:047:037:34
7:34
#5716
35K
21.75 mi12:59:252:33:207:035:16
7:02
#5692
23M
23.00 mi13:08:272:42:227:049:02
7:13
#5581
24M
24.00 mi13:15:382:49:337:047:11
7:11
#5538
40K
24.85 mi13:21:542:55:497:046:16
7:20
#5490
25.2M
25.20 mi13:24:392:58:347:052:45
7:58
#5472
Finish
26.22 mi13:31:523:05:477:057:13
7:05
#5424
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi9467784678465381(Top 20%)4966(Top 33%)4966(Top 221%)
10K6.21 mi3.10 mi8183+12847073+7737073+7737053(Top 26%)6274(Top 41%)6274(Top 279%)
15K9.32 mi3.11 mi7211+9726403+6706403+6705381(Top 20%)4966(Top 33%)4966(Top 221%)
20K12.43 mi3.11 mi6788+4236089+3146089+3145700(Top 21%)5227(Top 34%)5227(Top 232%)
Half13.11 mi0.68 mi6718+706032+576032+575199(Top 20%)4809(Top 32%)4809(Top 214%)
25K15.53 mi2.42 mi6365+3535751+2815751+2814329(Top 16%)4045(Top 27%)4045(Top 180%)
30K18.64 mi3.11 mi5971+3945444+3075444+3074538(Top 17%)4202(Top 28%)4202(Top 187%)
20M20.00 mi1.36 mi5797+1745295+1495295+1494221(Top 16%)3900(Top 26%)3900(Top 173%)
21M21.00 mi1.00 mi5716+815229+665229+664908(Top 18%)4411(Top 29%)4411(Top 196%)
35K21.75 mi0.75 mi5692+245205+245205+245548(Top 21%)4911(Top 32%)4911(Top 218%)
23M23.00 mi1.25 mi5581+1115103+1025103+1024878(Top 18%)4377(Top 29%)4377(Top 194%)
24M24.00 mi1.00 mi5538+435053+505053+505630(Top 21%)4862(Top 32%)4862(Top 216%)
40K24.85 mi0.85 mi5490+485004+495004+495625(Top 21%)4772(Top 31%)4772(Top 212%)
25.2M25.20 mi0.35 mi5472+184989+154989+156277(Top 24%)5113(Top 34%)5113(Top 227%)
Finish26.22 mi1.02 mi5424+484943+464943+465691(Top 21%)4718(Top 31%)4718(Top 210%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21story building
+97ft-345ft

Overall

5381

Males

4966

M45-49

4966

5K→10K

3.1 - 6.2 mi

Top 26%
×5story building
+79ft-138ft

Overall

7053

Males

6274

M45-49

6274

10K→15K

6.2 - 9.3 mi

Top 20%
×3story building
+67ft-78ft

Overall

5381

Males

4966

M45-49

4966

15K→20K

9.3 - 12.4 mi

Top 21%
×5story building
+106ft-86ft

Overall

5700

Males

5227

M45-49

5227

20K→Half

12.4 - 13.1 mi

Top 20%
×2story building
+19ft-37ft

Overall

5199

Males

4809

M45-49

4809

Half→25K

13.1 - 15.5 mi

Top 16%
×4story building
+66ft-88ft

Overall

4329

Males

4045

M45-49

4045

25K→30K

15.5 - 18.6 mi

Top 17%
×9story building
+181ft-148ft

Overall

4538

Males

4202

M45-49

4202

30K→20M

18.6 - 20.0 mi

Top 16%
×5story building
+64ft-50ft

Overall

4221

Males

3900

M45-49

3900

20M→21M

20.0 - 21.0 mi

Top 18%
×8story building
+106ft-24ft

Overall

4908

Males

4411

M45-49

4411

21M→35K

21.0 - 21.8 mi

Top 21%
×7story building
+17ft-86ft

Overall

5548

Males

4911

M45-49

4911

35K→23M

21.8 - 23.0 mi

Top 18%
×5story building
+23ft-63ft

Overall

4878

Males

4377

M45-49

4377

23M→24M

23.0 - 24.0 mi

Top 21%
×6story building
+12ft-82ft

Overall

5630

Males

4862

M45-49

4862

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

5625

Males

4772

M45-49

4772

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6277

Males

5113

M45-49

5113

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2story building
+22ft-21ft

Overall

5691

Males

4718

M45-49

4718

Passing Analysis

Category:
Athletes Passed
4208
Passed By
165
Net Change
+4043
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9467
5K → 10K130016+1284#9467#8183
10K → 15K9720+972#8183#7211
15K → 20K4241+423#7211#6788
20K → Half700+70#6788#6718
Half → 25K3552+353#6718#6365
25K → 30K4006+394#6365#5971
30K → 20M1762+174#5971#5797
20M → 21M9817+81#5797#5716
21M → 35K4218+24#5716#5692
35K → 23M13120+111#5692#5581
23M → 24M6825+43#5581#5538
24M → 40K6416+48#5538#5490
40K → 25.2M3012+18#5490#5472
25.2M → Finish7830+48#5472#5424
TOTALS4208165+4043
📊

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