Boston Marathon logo
BOSTON MARATHON 2023

Sandra Urlin

Bib: 18319•F

ON

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 43%
Gender (Female)
#0 / 11423
Top 24%
Division (F18-39)
#0 / 4884
Top 40%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:26
Rank: #12962
Start → 5K
24:26 | 7:52/mi
10K· 6.21 mi
48:42
Rank: #13054 (-92)
5K → 10K
24:16 | 7:49/mi
15K· 9.32 mi
1:13:05
Rank: #13046 (+8)
10K → 15K
24:23 | 7:51/mi
20K· 12.43 mi
1:37:24
Rank: #12745 (+301)
15K → 20K
24:19 | 7:50/mi
Half· 13.11 mi
1:42:43
Rank: #12729 (+16)
20K → Half
5:19 | 7:48/mi
25K· 15.53 mi
2:01:48
Rank: #12517 (+212)
Half → 25K
19:05 | 7:52/mi
30K· 18.64 mi
2:26:35
Rank: #12152 (+365)
25K → 30K
24:47 | 7:59/mi
20M
2:37:29
Rank: #12003 (+149)
30K → 20M
10:54 | 8:01/mi
21M
2:46:02
Rank: #11924 (+79)
20M → 21M
8:33 | 8:33/mi
35K· 21.75 mi
2:51:48
Rank: #11847 (+77)
21M → 35K
5:46 | 7:42/mi
23M
3:01:47
Rank: #11674 (+173)
35K → 23M
9:59 | 7:58/mi
24M
3:09:34
Rank: #11578 (+96)
23M → 24M
7:47 | 7:47/mi
40K· 24.85 mi
3:16:20
Rank: #11474 (+104)
24M → 40K
6:46 | 7:55/mi
25.2M
3:19:17
Rank: #11435 (+39)
40K → 25.2M
2:57 | 8:33/mi
Finish· 26.22 mi
3:27:04
Rank: #11319 (+116)
25.2M → Finish
7:47 | 7:38/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:43
Pace7:50 /mi
2nd Half
Distance13.11 mi
Time1:44:21
Pace7:58 /mi
📊Positive Split: 1.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:5324:267:5224:26
7:52
-
10K
6.21 mi11:40:0948:427:5024:16
7:49
-0:03
15K
9.32 mi12:04:321:13:057:5024:23
7:51
+0:02
20K
12.43 mi12:28:511:37:247:5024:19
7:50
-0:01
Half
13.11 mi12:34:101:42:437:505:19
7:48
-0:02
25K
15.53 mi12:53:152:01:487:5019:05
7:52
+0:04
30K
18.64 mi13:18:022:26:357:5224:47
7:59
+0:07
20M
20.00 mi13:28:562:37:297:5210:54
8:01
+0:02
21M
21.00 mi13:37:292:46:027:548:33
8:33
+0:32
35K
21.75 mi13:43:152:51:487:545:46
7:42
-0:51
23M
23.00 mi13:53:143:01:477:549:59
7:58
+0:16
24M
24.00 mi14:01:013:09:347:547:47
7:47
-0:11
40K
24.85 mi14:07:473:16:207:546:46
7:55
+0:08
25.2M
25.20 mi14:10:443:19:177:542:57
8:33
+0:38
Finish
26.22 mi14:18:313:27:047:547:47
7:38
-0:55

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

7:38 /mi

Average Pace

7:54 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:15:34

94% of race

Time at Steady Pace

11:30

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:54 /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 mi11:15:5324:267:5224:26
7:52
#12962
10K
6.21 mi11:40:0948:427:5024:16
7:49
#13054
15K
9.32 mi12:04:321:13:057:5024:23
7:51
#13046
20K
12.43 mi12:28:511:37:247:5024:19
7:50
#12745
Half
13.11 mi12:34:101:42:437:505:19
7:48
#12729
25K
15.53 mi12:53:152:01:487:5019:05
7:52
#12517
30K
18.64 mi13:18:022:26:357:5224:47
7:59
#12152
20M
20.00 mi13:28:562:37:297:5210:54
8:01
#12003
21M
21.00 mi13:37:292:46:027:548:33
8:33
#11924
35K
21.75 mi13:43:152:51:487:545:46
7:42
#11847
23M
23.00 mi13:53:143:01:477:549:59
7:58
#11674
24M
24.00 mi14:01:013:09:347:547:47
7:47
#11578
40K
24.85 mi14:07:473:16:207:546:46
7:55
#11474
25.2M
25.20 mi14:10:443:19:177:542:57
8:33
#11435
Finish
26.22 mi14:18:313:27:047:547:47
7:38
#11319
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi129623414341413109(Top 49%)3542(Top 31%)3542(Top 73%)
10K6.21 mi3.10 mi13054-923475-613475-6113219(Top 50%)3559(Top 31%)3559(Top 73%)
15K9.32 mi3.11 mi13046+83486-113486-1113109(Top 49%)3542(Top 31%)3542(Top 73%)
20K12.43 mi3.11 mi12745+3013328+1583328+15811972(Top 45%)2955(Top 26%)2955(Top 61%)
Half13.11 mi0.68 mi12729+163325+33325+312682(Top 48%)3288(Top 29%)3288(Top 67%)
25K15.53 mi2.42 mi12517+2123239+863239+8611701(Top 44%)2894(Top 25%)2894(Top 59%)
30K18.64 mi3.11 mi12152+3653060+1793060+17910720(Top 40%)2505(Top 22%)2505(Top 51%)
20M20.00 mi1.36 mi12003+1493001+593001+5910460(Top 39%)2468(Top 22%)2468(Top 51%)
21M21.00 mi1.00 mi11924+792967+342967+3410783(Top 41%)2762(Top 24%)2762(Top 57%)
35K21.75 mi0.75 mi11847+772943+242943+2410053(Top 38%)2391(Top 21%)2391(Top 49%)
23M23.00 mi1.25 mi11674+1732862+812862+819594(Top 36%)2304(Top 20%)2304(Top 47%)
24M24.00 mi1.00 mi11578+962832+302832+309697(Top 36%)2446(Top 21%)2446(Top 50%)
40K24.85 mi0.85 mi11474+1042798+342798+349485(Top 36%)2400(Top 21%)2400(Top 49%)
25.2M25.20 mi0.35 mi11435+392792+62792+69939(Top 37%)2655(Top 23%)2655(Top 54%)
Finish26.22 mi1.02 mi11319+1162749+432749+439576(Top 36%)2506(Top 22%)2506(Top 51%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21stories
+97ft-345ft

Overall

13109

Females

3542

F18-39

3542

5K→10K

3.1 - 6.2 mi

Top 50%
×5stories
+79ft-138ft

Overall

13219

Females

3559

F18-39

3559

10K→15K

6.2 - 9.3 mi

Top 49%
×3stories
+67ft-78ft

Overall

13109

Females

3542

F18-39

3542

15K→20K

9.3 - 12.4 mi

Top 45%
×5stories
+106ft-86ft

Overall

11972

Females

2955

F18-39

2955

20K→Half

12.4 - 13.1 mi

Top 48%
×2stories
+19ft-37ft

Overall

12682

Females

3288

F18-39

3288

Half→25K

13.1 - 15.5 mi

Top 44%
×4stories
+66ft-88ft

Overall

11701

Females

2894

F18-39

2894

25K→30K

15.5 - 18.6 mi

Top 40%
×9stories
+181ft-148ft

Overall

10720

Females

2505

F18-39

2505

30K→20M

18.6 - 20.0 mi

Top 39%
×5stories
+64ft-50ft

Overall

10460

Females

2468

F18-39

2468

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

10783

Females

2762

F18-39

2762

21M→35K

21.0 - 21.8 mi

Top 38%
×7stories
+17ft-86ft

Overall

10053

Females

2391

F18-39

2391

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

9594

Females

2304

F18-39

2304

23M→24M

23.0 - 24.0 mi

Top 36%
×6stories
+12ft-82ft

Overall

9697

Females

2446

F18-39

2446

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9485

Females

2400

F18-39

2400

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

9939

Females

2655

F18-39

2655

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2stories
+22ft-21ft

Overall

9576

Females

2506

F18-39

2506

Passing Analysis

Category:
Athletes Passed
2566
Passed By
923
Net Change
+1643
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12962
5K → 10K266358-92#12962#13054
10K → 15K221213+8#13054#13046
15K → 20K34847+301#13046#12745
20K → Half4529+16#12745#12729
Half → 25K25442+212#12729#12517
25K → 30K40742+365#12517#12152
30K → 20M18233+149#12152#12003
20M → 21M12950+79#12003#11924
21M → 35K9013+77#11924#11847
35K → 23M19421+173#11847#11674
23M → 24M11822+96#11674#11578
24M → 40K12420+104#11578#11474
40K → 25.2M4910+39#11474#11435
25.2M → Finish13923+116#11435#11319
TOTALS2566923+1643
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing