Boston Marathon logo
BOSTON MARATHON 2023

Jessica Ahern

Bib: 25456•F

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F40-44)
#0 / 1878
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
10:45/mi
33:23
↑ 97↓ 3451.5%
10K· 6.21 mi
12:01/mi
1:10:44
↑ 79↓ 1380.4%
15K· 9.32 mi
11:53/mi
1:47:39
↑ 67↓ 78
20K· 12.43 mi
13:11/mi
2:28:37
↑ 106↓ 860.1%
Half· 13.11 mi
12:19/mi
2:37:01
↑ 19↓ 370.5%
25K· 15.53 mi
12:29/mi
3:07:17
↑ 66↓ 880.2%
30K· 18.64 mi
13:12/mi
3:48:18
↑ 181↓ 1480.2%
20M
12:50/mi
4:05:45
↑ 64↓ 500.2%
21M
14:08/mi
4:19:53
↑ 106↓ 241.6%
35K· 21.75 mi
12:47/mi
4:29:27
↑ 17↓ 861.7%
23M
12:06/mi
4:44:36
↑ 23↓ 630.6%
24M
12:02/mi
4:56:38
↓ 821.3%
40K· 24.85 mi
12:27/mi
5:07:17
↓ 200.3%
25.2M
13:44/mi
5:12:01
↑ 13↓ 160.2%
Finish· 26.22 mi
12:20/mi
5:24:35
↑ 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
Time2:37:01
Pace11:59 /mi
2nd Half
Distance13.11 mi
Time2:47:34
Pace12:47 /mi
📊Positive Split: 6.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:0933:2310:4533:23
10:45
-
10K
6.21 mi12:32:301:10:4411:2337:21
12:01
+1:16
15K
9.32 mi13:09:251:47:3911:3336:55
11:53
-0:08
20K
12.43 mi13:50:232:28:3711:5840:58
13:11
+1:18
Half
13.11 mi13:58:472:37:0111:598:24
12:19
-0:52
25K
15.53 mi14:29:033:07:1712:0330:16
12:29
+0:10
30K
18.64 mi15:10:043:48:1812:1541:01
13:12
+0:43
20M
20.00 mi15:27:314:05:4512:1717:27
12:50
-0:22
21M
21.00 mi15:41:394:19:5312:2314:08
14:08
+1:18
35K
21.75 mi15:51:134:29:2712:239:34
12:47
-1:21
23M
23.00 mi16:06:224:44:3612:2215:09
12:06
-0:41
24M
24.00 mi16:18:244:56:3812:2212:02
12:02
-0:04
40K
24.85 mi16:29:035:07:1712:2210:39
12:27
+0:25
25.2M
25.20 mi16:33:475:12:0112:234:44
13:44
+1:17
Finish
26.22 mi16:46:215:24:3512:2312:34
12:20
-1:24

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

10:45 /mi

Average Pace

12:23 /mi

Slowest Pace

14:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:59:41

37% of race

Time at Steady Pace

1:44:03

32% of race

Time at Slower Pace

1:40:51

31% of race

Average Pace: 12:23 /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 mi11:55:0933:2310:4533:23
10:45
#25272
10K
6.21 mi12:32:301:10:4411:2337:21
12:01
#26001
15K
9.32 mi13:09:251:47:3911:3336:55
11:53
#26016
20K
12.43 mi13:50:232:28:3711:5840:58
13:11
#26137
Half
13.11 mi13:58:472:37:0111:598:24
12:19
#26136
25K
15.53 mi14:29:033:07:1712:0330:16
12:29
#26051
30K
18.64 mi15:10:043:48:1812:1541:01
13:12
#25980
20M
20.00 mi15:27:314:05:4512:1717:27
12:50
#25932
21M
21.00 mi15:41:394:19:5312:2314:08
14:08
#25889
35K
21.75 mi15:51:134:29:2712:239:34
12:47
#25878
23M
23.00 mi16:06:224:44:3612:2215:09
12:06
#25805
24M
24.00 mi16:18:244:56:3812:2212:02
12:02
#25779
40K
24.85 mi16:29:035:07:1712:2210:39
12:27
#25738
25.2M
25.20 mi16:33:475:12:0112:234:44
13:44
#25737
Finish
26.22 mi16:46:215:24:3512:2312:34
12:20
#25745
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi25272105971059725986(Top 98%)11031(Top 97%)11031(Top 587%)
10K6.21 mi3.10 mi26001-72911044-44711044-44726286(Top 99%)11223(Top 98%)11223(Top 598%)
15K9.32 mi3.11 mi26016-1511046-211046-225986(Top 98%)11031(Top 97%)11031(Top 587%)
20K12.43 mi3.11 mi26137-12111124-7811124-7826313(Top 99%)11243(Top 98%)11243(Top 599%)
Half13.11 mi0.68 mi26136+111125-111125-126065(Top 98%)11099(Top 97%)11099(Top 591%)
25K15.53 mi2.42 mi26051+8511077+4811077+4825535(Top 96%)10813(Top 95%)10813(Top 576%)
30K18.64 mi3.11 mi25980+7111043+3411043+3425574(Top 96%)10880(Top 95%)10880(Top 579%)
20M20.00 mi1.36 mi25932+4811013+3011013+3025050(Top 94%)10631(Top 93%)10631(Top 566%)
21M21.00 mi1.00 mi25889+4310996+1710996+1725152(Top 94%)10691(Top 94%)10691(Top 569%)
35K21.75 mi0.75 mi25878+1110991+510991+525413(Top 95%)10870(Top 95%)10870(Top 579%)
23M23.00 mi1.25 mi25805+7310959+3210959+3224139(Top 91%)10206(Top 89%)10206(Top 543%)
24M24.00 mi1.00 mi25779+2610947+1210947+1224587(Top 92%)10483(Top 92%)10483(Top 558%)
40K24.85 mi0.85 mi25738+4110930+1710930+1724402(Top 92%)10394(Top 91%)10394(Top 553%)
25.2M25.20 mi0.35 mi25737+110929+110929+124780(Top 93%)10585(Top 93%)10585(Top 564%)
Finish26.22 mi1.02 mi25745-810939-1010939-1025543(Top 96%)10943(Top 96%)10943(Top 583%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 98%
×21story building
+97ft-345ft

Overall

25986

Females

11031

F40-44

11031

5K→10K

3.1 - 6.2 mi

Top 99%
×5story building
+79ft-138ft

Overall

26286

Females

11223

F40-44

11223

10K→15K

6.2 - 9.3 mi

Top 98%
×3story building
+67ft-78ft

Overall

25986

Females

11031

F40-44

11031

15K→20K

9.3 - 12.4 mi

Top 99%
×5story building
+106ft-86ft

Overall

26313

Females

11243

F40-44

11243

20K→Half

12.4 - 13.1 mi

Top 98%
×2story building
+19ft-37ft

Overall

26065

Females

11099

F40-44

11099

Half→25K

13.1 - 15.5 mi

Top 96%
×4story building
+66ft-88ft

Overall

25535

Females

10813

F40-44

10813

25K→30K

15.5 - 18.6 mi

Top 96%
×9story building
+181ft-148ft

Overall

25574

Females

10880

F40-44

10880

30K→20M

18.6 - 20.0 mi

Top 94%
×5story building
+64ft-50ft

Overall

25050

Females

10631

F40-44

10631

20M→21M

20.0 - 21.0 mi

Top 94%
×8story building
+106ft-24ft

Overall

25152

Females

10691

F40-44

10691

21M→35K

21.0 - 21.8 mi

Top 95%
×7story building
+17ft-86ft

Overall

25413

Females

10870

F40-44

10870

35K→23M

21.8 - 23.0 mi

Top 91%
×5story building
+23ft-63ft

Overall

24139

Females

10206

F40-44

10206

23M→24M

23.0 - 24.0 mi

Top 92%
×6story building
+12ft-82ft

Overall

24587

Females

10483

F40-44

10483

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

24402

Females

10394

F40-44

10394

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

24780

Females

10585

F40-44

10585

25.2M→Finish

25.2 - 26.2 mi

Top 96%
×2story building
+22ft-21ft

Overall

25543

Females

10943

F40-44

10943

Passing Analysis

Category:
Athletes Passed
532
Passed By
1005
Net Change
-473
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25272
5K → 10K8737-729#25272#26001
10K → 15K5065-15#26001#26016
15K → 20K9130-121#26016#26137
20K → Half109+1#26137#26136
Half → 25K916+85#26136#26051
25K → 30K8817+71#26051#25980
30K → 20M524+48#25980#25932
20M → 21M485+43#25932#25889
21M → 35K187+11#25889#25878
35K → 23M730+73#25878#25805
23M → 24M260+26#25805#25779
24M → 40K432+41#25779#25738
40K → 25.2M32+1#25738#25737
25.2M → Finish1321-8#25737#25745
TOTALS5321005-473
📊

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