Boston Marathon logo
BOSTON MARATHON 2023

Heather Ross

Bib: 18383•F

KY

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 50%
Gender (Female)
#0 / 11423
Top 34%
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
7:59/mi
24:47
↑ 97↓ 3451.5%
10K· 6.21 mi
7:52/mi
49:12
↑ 79↓ 1380.4%
15K· 9.32 mi
7:49/mi
1:13:30
↑ 67↓ 78
20K· 12.43 mi
7:56/mi
1:38:10
↑ 106↓ 860.1%
Half· 13.11 mi
8:02/mi
1:43:39
↑ 19↓ 370.5%
25K· 15.53 mi
8:10/mi
2:03:27
↑ 66↓ 880.2%
30K· 18.64 mi
8:28/mi
2:29:44
↑ 181↓ 1480.2%
20M
8:34/mi
2:41:23
↑ 64↓ 500.2%
21M
8:48/mi
2:50:11
↑ 106↓ 241.6%
35K· 21.75 mi
8:29/mi
2:56:32
↑ 17↓ 861.7%
23M
8:38/mi
3:07:20
↑ 23↓ 630.6%
24M
8:22/mi
3:15:42
↓ 821.3%
40K· 24.85 mi
8:25/mi
3:22:54
↓ 200.3%
25.2M
8:56/mi
3:25:59
↑ 13↓ 160.2%
Finish· 26.22 mi
7:44/mi
3:33:52
↑ 22↓ 21

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
Time1:43:39
Pace7:54 /mi
2nd Half
Distance13.11 mi
Time1:50:13
Pace8:24 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0024:477:5924:47
7:59
-
10K
6.21 mi11:43:2549:127:5524:25
7:52
-0:07
15K
9.32 mi12:07:431:13:307:5324:18
7:49
-0:03
20K
12.43 mi12:32:231:38:107:5424:40
7:56
+0:07
Half
13.11 mi12:37:521:43:397:545:29
8:02
+0:06
25K
15.53 mi12:57:402:03:277:5719:48
8:10
+0:08
30K
18.64 mi13:23:572:29:448:0226:17
8:28
+0:18
20M
20.00 mi13:35:362:41:238:0411:39
8:34
+0:06
21M
21.00 mi13:44:242:50:118:068:48
8:48
+0:14
35K
21.75 mi13:50:452:56:328:076:21
8:29
-0:19
23M
23.00 mi14:01:333:07:208:0910:48
8:38
+0:09
24M
24.00 mi14:09:553:15:428:098:22
8:22
-0:16
40K
24.85 mi14:17:073:22:548:107:12
8:25
+0:03
25.2M
25.20 mi14:20:123:25:598:103:05
8:56
+0:31
Finish
26.22 mi14:28:053:33:528:107:53
7:44
-1:12

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

7:44 /mi

Average Pace

8:10 /mi

Slowest Pace

8:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:59:32

84% of race

Time at Steady Pace

34:20

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:09 /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 mi11:19:0024:477:5924:47
7:59
#13865
10K
6.21 mi11:43:2549:127:5524:25
7:52
#13730
15K
9.32 mi12:07:431:13:307:5324:18
7:49
#13461
20K
12.43 mi12:32:231:38:107:5424:40
7:56
#13315
Half
13.11 mi12:37:521:43:397:545:29
8:02
#13376
25K
15.53 mi12:57:402:03:277:5719:48
8:10
#13444
30K
18.64 mi13:23:572:29:448:0226:17
8:28
#13536
20M
20.00 mi13:35:362:41:238:0411:39
8:34
#13581
21M
21.00 mi13:44:242:50:118:068:48
8:48
#13489
35K
21.75 mi13:50:452:56:328:076:21
8:29
#13546
23M
23.00 mi14:01:333:07:208:0910:48
8:38
#13554
24M
24.00 mi14:09:553:15:428:098:22
8:22
#13531
40K
24.85 mi14:17:073:22:548:107:12
8:25
#13481
25.2M
25.20 mi14:20:123:25:598:103:05
8:56
#13443
Finish
26.22 mi14:28:053:33:528:107:53
7:44
#13305
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi138653941394112923(Top 49%)3430(Top 30%)3430(Top 70%)
10K6.21 mi3.10 mi13730+1353886+553886+5513651(Top 51%)3825(Top 33%)3825(Top 78%)
15K9.32 mi3.11 mi13461+2693726+1603726+16012923(Top 49%)3430(Top 30%)3430(Top 70%)
20K12.43 mi3.11 mi13315+1463670+563670+5612956(Top 49%)3525(Top 31%)3525(Top 72%)
Half13.11 mi0.68 mi13376-613710-403710-4014688(Top 55%)4484(Top 39%)4484(Top 92%)
25K15.53 mi2.42 mi13444-683771-613771-6113994(Top 53%)4214(Top 37%)4214(Top 86%)
30K18.64 mi3.11 mi13536-923860-893860-8914049(Top 53%)4357(Top 38%)4357(Top 89%)
20M20.00 mi1.36 mi13581-453911-513911-5114082(Top 53%)4454(Top 39%)4454(Top 91%)
21M21.00 mi1.00 mi13489+923868+433868+4312282(Top 46%)3559(Top 31%)3559(Top 73%)
35K21.75 mi0.75 mi13546-573912-443912-4415240(Top 57%)5244(Top 46%)5244(Top 107%)
23M23.00 mi1.25 mi13554-83948-363948-3613947(Top 52%)4580(Top 40%)4580(Top 94%)
24M24.00 mi1.00 mi13531+233959-113959-1113655(Top 51%)4474(Top 39%)4474(Top 92%)
40K24.85 mi0.85 mi13481+503949+103949+1012868(Top 48%)4141(Top 36%)4141(Top 85%)
25.2M25.20 mi0.35 mi13443+383940+93940+912238(Top 46%)3851(Top 34%)3851(Top 79%)
Finish26.22 mi1.02 mi13305+1383879+613879+6110251(Top 39%)2828(Top 25%)2828(Top 58%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21story building
+97ft-345ft

Overall

12923

Females

3430

F18-39

3430

5K→10K

3.1 - 6.2 mi

Top 51%
×5story building
+79ft-138ft

Overall

13651

Females

3825

F18-39

3825

10K→15K

6.2 - 9.3 mi

Top 49%
×3story building
+67ft-78ft

Overall

12923

Females

3430

F18-39

3430

15K→20K

9.3 - 12.4 mi

Top 49%
×5story building
+106ft-86ft

Overall

12956

Females

3525

F18-39

3525

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

14688

Females

4484

F18-39

4484

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

13994

Females

4214

F18-39

4214

25K→30K

15.5 - 18.6 mi

Top 53%
×9story building
+181ft-148ft

Overall

14049

Females

4357

F18-39

4357

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

14082

Females

4454

F18-39

4454

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

12282

Females

3559

F18-39

3559

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

15240

Females

5244

F18-39

5244

35K→23M

21.8 - 23.0 mi

Top 52%
×5story building
+23ft-63ft

Overall

13947

Females

4580

F18-39

4580

23M→24M

23.0 - 24.0 mi

Top 51%
×6story building
+12ft-82ft

Overall

13655

Females

4474

F18-39

4474

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

12868

Females

4141

F18-39

4141

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12238

Females

3851

F18-39

3851

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2story building
+22ft-21ft

Overall

10251

Females

2828

F18-39

2828

Passing Analysis

Category:
Athletes Passed
1988
Passed By
1428
Net Change
+560
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13865
5K → 10K366231+135#13865#13730
10K → 15K35283+269#13730#13461
15K → 20K252106+146#13461#13315
20K → Half1475-61#13315#13376
Half → 25K123191-68#13376#13444
25K → 30K160252-92#13444#13536
30K → 20M79124-45#13536#13581
20M → 21M13442+92#13581#13489
21M → 35K4299-57#13489#13546
35K → 23M8694-8#13546#13554
23M → 24M8158+23#13554#13531
24M → 40K8939+50#13531#13481
40K → 25.2M5416+38#13481#13443
25.2M → Finish15618+138#13443#13305
TOTALS19881428+560
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing