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BOSTON MARATHON 2023

Julianna Determan

Bib: 9742•F

IL

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 49%
Gender (Female)
#0 / 11423
Top 32%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:25
Rank: #9985
Start → 5K
23:25 | 7:32/mi
10K· 6.21 mi
46:16
Rank: #9558 (+427)
5K → 10K
22:51 | 7:21/mi
15K· 9.32 mi
1:09:12
Rank: #9398 (+160)
10K → 15K
22:56 | 7:23/mi
20K· 12.43 mi
1:33:08
Rank: #9777 (-379)
15K → 20K
23:56 | 7:42/mi
Half· 13.11 mi
1:38:25
Rank: #9916 (-139)
20K → Half
5:17 | 7:45/mi
25K· 15.53 mi
1:58:09
Rank: #10533 (-617)
Half → 25K
19:44 | 8:08/mi
30K· 18.64 mi
2:24:30
Rank: #11182 (-649)
25K → 30K
26:21 | 8:29/mi
20M
2:36:24
Rank: #11537 (-355)
30K → 20M
11:54 | 8:45/mi
21M
2:45:50
Rank: #11838 (-301)
20M → 21M
9:26 | 9:26/mi
35K· 21.75 mi
2:52:11
Rank: #11975 (-137)
21M → 35K
6:21 | 8:29/mi
23M
3:04:08
Rank: #12487 (-512)
35K → 23M
11:57 | 9:33/mi
24M
3:13:06
Rank: #12733 (-246)
23M → 24M
8:58 | 8:58/mi
40K· 24.85 mi
3:21:00
Rank: #12930 (-197)
24M → 40K
7:54 | 9:14/mi
25.2M
3:24:14
Rank: #12950 (-20)
40K → 25.2M
3:14 | 9:23/mi
Finish· 26.22 mi
3:32:46
Rank: #12993 (-43)
25.2M → Finish
8:32 | 8:22/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:25
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:54:21
Pace8:43 /mi
📊Positive Split: 16.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:3823:257:3223:25
7:32
-
10K
6.21 mi11:17:2946:167:2722:51
7:21
-0:11
15K
9.32 mi11:40:251:09:127:2522:56
7:23
+0:02
20K
12.43 mi12:04:211:33:087:3023:56
7:42
+0:19
Half
13.11 mi12:09:381:38:257:305:17
7:45
+0:03
25K
15.53 mi12:29:221:58:097:3619:44
8:08
+0:23
30K
18.64 mi12:55:432:24:307:4526:21
8:29
+0:21
20M
20.00 mi13:07:372:36:247:4911:54
8:45
+0:16
21M
21.00 mi13:17:032:45:507:549:26
9:26
+0:41
35K
21.75 mi13:23:242:52:117:556:21
8:29
-0:57
23M
23.00 mi13:35:213:04:088:0011:57
9:33
+1:04
24M
24.00 mi13:44:193:13:068:038:58
8:58
-0:35
40K
24.85 mi13:52:133:21:008:057:54
9:14
+0:16
25.2M
25.20 mi13:55:273:24:148:063:14
9:23
+0:09
Finish
26.22 mi14:03:593:32:468:078:32
8:22
-1:01

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

7:21 /mi

Average Pace

8:07 /mi

Slowest Pace

9:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:38:25

46% of race

Time at Steady Pace

1:12:52

34% of race

Time at Slower Pace

41:29

19% of race

Average Pace: 8:07 /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 mi10:54:3823:257:3223:25
7:32
#9985
10K
6.21 mi11:17:2946:167:2722:51
7:21
#9558
15K
9.32 mi11:40:251:09:127:2522:56
7:23
#9398
20K
12.43 mi12:04:211:33:087:3023:56
7:42
#9777
Half
13.11 mi12:09:381:38:257:305:17
7:45
#9916
25K
15.53 mi12:29:221:58:097:3619:44
8:08
#10533
30K
18.64 mi12:55:432:24:307:4526:21
8:29
#11182
20M
20.00 mi13:07:372:36:247:4911:54
8:45
#11537
21M
21.00 mi13:17:032:45:507:549:26
9:26
#11838
35K
21.75 mi13:23:242:52:117:556:21
8:29
#11975
23M
23.00 mi13:35:213:04:088:0011:57
9:33
#12487
24M
24.00 mi13:44:193:13:068:038:58
8:58
#12733
40K
24.85 mi13:52:133:21:008:057:54
9:14
#12930
25.2M
25.20 mi13:55:273:24:148:063:14
9:23
#12950
Finish
26.22 mi14:03:593:32:468:078:32
8:22
#12993
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9985186018609204(Top 35%)1526(Top 13%)1526(Top 31%)
10K6.21 mi3.10 mi9558+4271639+2211639+2219284(Top 35%)1539(Top 13%)1539(Top 32%)
15K9.32 mi3.11 mi9398+1601579+601579+609204(Top 35%)1526(Top 13%)1526(Top 31%)
20K12.43 mi3.11 mi9777-3791742-1631742-16310967(Top 41%)2388(Top 21%)2388(Top 49%)
Half13.11 mi0.68 mi9916-1391802-601802-6012328(Top 46%)3120(Top 27%)3120(Top 64%)
25K15.53 mi2.42 mi10533-6172110-3082110-30813800(Top 52%)4093(Top 36%)4093(Top 84%)
30K18.64 mi3.11 mi11182-6492521-4112521-41114192(Top 53%)4444(Top 39%)4444(Top 91%)
20M20.00 mi1.36 mi11537-3552736-2152736-21515194(Top 57%)5103(Top 45%)5103(Top 104%)
21M21.00 mi1.00 mi11838-3012925-1892925-18915651(Top 59%)5422(Top 47%)5422(Top 111%)
35K21.75 mi0.75 mi11975-1373008-833008-8315237(Top 57%)5241(Top 46%)5241(Top 107%)
23M23.00 mi1.25 mi12487-5123321-3133321-31318494(Top 69%)7121(Top 62%)7121(Top 146%)
24M24.00 mi1.00 mi12733-2463491-1703491-17017075(Top 64%)6392(Top 56%)6392(Top 131%)
40K24.85 mi0.85 mi12930-1973633-1423633-14217272(Top 65%)6544(Top 57%)6544(Top 134%)
25.2M25.20 mi0.35 mi12950-203656-233656-2314587(Top 55%)5053(Top 44%)5053(Top 103%)
Finish26.22 mi1.02 mi12993-433696-403696-4014574(Top 55%)5025(Top 44%)5025(Top 103%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9204

Females

1526

F18-39

1526

5K→10K

3.1 - 6.2 mi

Top 35%
×5stories
+79ft-138ft

Overall

9284

Females

1539

F18-39

1539

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9204

Females

1526

F18-39

1526

15K→20K

9.3 - 12.4 mi

Top 41%
×5stories
+106ft-86ft

Overall

10967

Females

2388

F18-39

2388

20K→Half

12.4 - 13.1 mi

Top 46%
×2stories
+19ft-37ft

Overall

12328

Females

3120

F18-39

3120

Half→25K

13.1 - 15.5 mi

Top 52%
×4stories
+66ft-88ft

Overall

13800

Females

4093

F18-39

4093

25K→30K

15.5 - 18.6 mi

Top 53%
×9stories
+181ft-148ft

Overall

14192

Females

4444

F18-39

4444

30K→20M

18.6 - 20.0 mi

Top 57%
×5stories
+64ft-50ft

Overall

15194

Females

5103

F18-39

5103

20M→21M

20.0 - 21.0 mi

Top 59%
×8stories
+106ft-24ft

Overall

15651

Females

5422

F18-39

5422

21M→35K

21.0 - 21.8 mi

Top 57%
×7stories
+17ft-86ft

Overall

15237

Females

5241

F18-39

5241

35K→23M

21.8 - 23.0 mi

Top 69%
×5stories
+23ft-63ft

Overall

18494

Females

7121

F18-39

7121

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

17075

Females

6392

F18-39

6392

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

17272

Females

6544

F18-39

6544

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14587

Females

5053

F18-39

5053

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2stories
+22ft-21ft

Overall

14574

Females

5025

F18-39

5025

Passing Analysis

Category:
Athletes Passed
1150
Passed By
4156
Net Change
-3008
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9985
5K → 10K563136+427#9985#9558
10K → 15K24989+160#9558#9398
15K → 20K58437-379#9398#9777
20K → Half3142-139#9777#9916
Half → 25K27642-617#9916#10533
25K → 30K56705-649#10533#11182
30K → 20M23378-355#11182#11537
20M → 21M24325-301#11537#11838
21M → 35K18155-137#11838#11975
35K → 23M12524-512#11975#12487
23M → 24M22268-246#12487#12733
24M → 40K29226-197#12733#12930
40K → 25.2M2444-20#12930#12950
25.2M → Finish4285-43#12950#12993
TOTALS11504156-3008
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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