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BOSTON MARATHON 2023

Iris De Jong

Bib: 18793•F

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 40%
Division (F18-39)
#0 / 4884
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
8:12/mi
25:29
↑ 97↓ 3451.5%
10K· 6.21 mi
8:03/mi
50:29
↑ 79↓ 1380.4%
15K· 9.32 mi
8:04/mi
1:15:34
↑ 67↓ 78
20K· 12.43 mi
8:07/mi
1:40:48
↑ 106↓ 860.1%
Half· 13.11 mi
8:08/mi
1:46:21
↑ 19↓ 370.5%
25K· 15.53 mi
8:12/mi
2:06:13
↑ 66↓ 880.2%
30K· 18.64 mi
8:29/mi
2:32:35
↑ 181↓ 1480.2%
20M
8:36/mi
2:44:16
↑ 64↓ 500.2%
21M
9:03/mi
2:53:19
↑ 106↓ 241.6%
35K· 21.75 mi
8:24/mi
2:59:36
↑ 17↓ 861.7%
23M
8:46/mi
3:10:34
↑ 23↓ 630.6%
24M
8:40/mi
3:19:14
↓ 821.3%
40K· 24.85 mi
8:46/mi
3:26:44
↓ 200.3%
25.2M
9:23/mi
3:29:58
↑ 13↓ 160.2%
Finish· 26.22 mi
8:10/mi
3:38:17
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:21
Pace8:07 /mi
2nd Half
Distance13.11 mi
Time1:51:56
Pace8:32 /mi
📊Positive Split: 5.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:4225:298:1225:29
8:12
-
10K
6.21 mi11:41:4250:298:0725:00
8:03
-0:09
15K
9.32 mi12:06:471:15:348:0625:05
8:04
+0:01
20K
12.43 mi12:32:011:40:488:0725:14
8:07
+0:03
Half
13.11 mi12:37:341:46:218:075:33
8:08
+0:01
25K
15.53 mi12:57:262:06:138:0819:52
8:12
+0:04
30K
18.64 mi13:23:482:32:358:1126:22
8:29
+0:17
20M
20.00 mi13:35:292:44:168:1311:41
8:36
+0:07
21M
21.00 mi13:44:322:53:198:159:03
9:03
+0:27
35K
21.75 mi13:50:492:59:368:156:17
8:24
-0:39
23M
23.00 mi14:01:473:10:348:1710:58
8:46
+0:22
24M
24.00 mi14:10:273:19:148:188:40
8:40
-0:06
40K
24.85 mi14:17:573:26:448:197:30
8:46
+0:06
25.2M
25.20 mi14:21:113:29:588:203:14
9:23
+0:37
Finish
26.22 mi14:29:303:38:178:208:19
8:10
-1:13

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

8:03 /mi

Average Pace

8:20 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:26:00

94% of race

Time at Steady Pace

12:17

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:20 /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 mi11:16:4225:298:1225:29
8:12
#15494
10K
6.21 mi11:41:4250:298:0725:00
8:03
#15285
15K
9.32 mi12:06:471:15:348:0625:05
8:04
#15169
20K
12.43 mi12:32:011:40:488:0725:14
8:07
#14955
Half
13.11 mi12:37:341:46:218:075:33
8:08
#14964
25K
15.53 mi12:57:262:06:138:0819:52
8:12
#14820
30K
18.64 mi13:23:482:32:358:1126:22
8:29
#14697
20M
20.00 mi13:35:292:44:168:1311:41
8:36
#14655
21M
21.00 mi13:44:322:53:198:159:03
9:03
#14573
35K
21.75 mi13:50:492:59:368:156:17
8:24
#14568
23M
23.00 mi14:01:473:10:348:1710:58
8:46
#14571
24M
24.00 mi14:10:273:19:148:188:40
8:40
#14585
40K
24.85 mi14:17:573:26:448:197:30
8:46
#14578
25.2M
25.20 mi14:21:113:29:588:203:14
9:23
#14575
Finish
26.22 mi14:29:303:38:178:208:19
8:10
#14496
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi154944962496214995(Top 56%)4676(Top 41%)4676(Top 96%)
10K6.21 mi3.10 mi15285+2094826+1364826+13615154(Top 57%)4762(Top 42%)4762(Top 98%)
15K9.32 mi3.11 mi15169+1164763+634763+6314995(Top 56%)4676(Top 41%)4676(Top 96%)
20K12.43 mi3.11 mi14955+2144656+1074656+10714389(Top 54%)4342(Top 38%)4342(Top 89%)
Half13.11 mi0.68 mi14964-94665-94665-915364(Top 58%)4898(Top 43%)4898(Top 100%)
25K15.53 mi2.42 mi14820+1444599+664599+6614200(Top 53%)4340(Top 38%)4340(Top 89%)
30K18.64 mi3.11 mi14697+1234552+474552+4714236(Top 53%)4474(Top 39%)4474(Top 92%)
20M20.00 mi1.36 mi14655+424553-14553-114263(Top 54%)4575(Top 40%)4575(Top 94%)
21M21.00 mi1.00 mi14573+824535+184535+1813709(Top 51%)4333(Top 38%)4333(Top 89%)
35K21.75 mi0.75 mi14568+54545-104545-1014743(Top 55%)4957(Top 43%)4957(Top 101%)
23M23.00 mi1.25 mi14571-34569-244569-2414769(Top 55%)5045(Top 44%)5045(Top 103%)
24M24.00 mi1.00 mi14585-144603-344603-3415475(Top 58%)5515(Top 48%)5515(Top 113%)
40K24.85 mi0.85 mi14578+74627-244627-2414952(Top 56%)5267(Top 46%)5267(Top 108%)
25.2M25.20 mi0.35 mi14575+34635-84635-814611(Top 55%)5077(Top 44%)5077(Top 104%)
Finish26.22 mi1.02 mi14496+794596+394596+3913206(Top 50%)4315(Top 38%)4315(Top 88%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

14995

Females

4676

F18-39

4676

5K→10K

3.1 - 6.2 mi

Top 57%
×5story building
+79ft-138ft

Overall

15154

Females

4762

F18-39

4762

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

14995

Females

4676

F18-39

4676

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

14389

Females

4342

F18-39

4342

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

15364

Females

4898

F18-39

4898

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

14200

Females

4340

F18-39

4340

25K→30K

15.5 - 18.6 mi

Top 53%
×9story building
+181ft-148ft

Overall

14236

Females

4474

F18-39

4474

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

14263

Females

4575

F18-39

4575

20M→21M

20.0 - 21.0 mi

Top 51%
×8story building
+106ft-24ft

Overall

13709

Females

4333

F18-39

4333

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

14743

Females

4957

F18-39

4957

35K→23M

21.8 - 23.0 mi

Top 55%
×5story building
+23ft-63ft

Overall

14769

Females

5045

F18-39

5045

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

15475

Females

5515

F18-39

5515

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

14952

Females

5267

F18-39

5267

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14611

Females

5077

F18-39

5077

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2story building
+22ft-21ft

Overall

13206

Females

4315

F18-39

4315

Passing Analysis

Category:
Athletes Passed
2035
Passed By
1037
Net Change
+998
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15494
5K → 10K424215+209#15494#15285
10K → 15K242126+116#15285#15169
15K → 20K29884+214#15169#14955
20K → Half3140-9#14955#14964
Half → 25K19753+144#14964#14820
25K → 30K227104+123#14820#14697
30K → 20M10361+42#14697#14655
20M → 21M12644+82#14655#14573
21M → 35K4439+5#14573#14568
35K → 23M7881-3#14568#14571
23M → 24M7084-14#14571#14585
24M → 40K6255+7#14585#14578
40K → 25.2M3027+3#14578#14575
25.2M → Finish10324+79#14575#14496
TOTALS20351037+998
📊

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