Boston Marathon logo
BOSTON MARATHON 2023

Jessamine Lee

Bib: 21914•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
Top 43%
Division (F45-49)
#0 / 1817
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
8:34/mi
26:36
↑ 97↓ 3451.5%
10K· 6.21 mi
8:12/mi
52:06
↑ 79↓ 1380.4%
15K· 9.32 mi
8:11/mi
1:17:31
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:43:54
↑ 106↓ 860.1%
Half· 13.11 mi
8:37/mi
1:49:47
↑ 19↓ 370.5%
25K· 15.53 mi
8:49/mi
2:11:10
↑ 66↓ 880.2%
30K· 18.64 mi
9:02/mi
2:39:13
↑ 181↓ 1480.2%
20M
9:16/mi
2:51:48
↑ 64↓ 500.2%
21M
9:26/mi
3:01:14
↑ 106↓ 241.6%
35K· 21.75 mi
9:45/mi
3:08:32
↑ 17↓ 861.7%
23M
9:06/mi
3:19:56
↑ 23↓ 630.6%
24M
9:15/mi
3:29:11
↓ 821.3%
40K· 24.85 mi
8:47/mi
3:36:42
↓ 200.3%
25.2M
8:27/mi
3:39:37
↑ 13↓ 160.2%
Finish· 26.22 mi
7:57/mi
3:47:43
↑ 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
Time1:49:47
Pace8:22 /mi
2nd Half
Distance13.11 mi
Time1:57:56
Pace9:00 /mi
📊Positive Split: 7.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:5126:368:3426:36
8:34
-
10K
6.21 mi11:45:2152:068:2325:30
8:12
-0:22
15K
9.32 mi12:10:461:17:318:1925:25
8:11
-0:01
20K
12.43 mi12:37:091:43:548:2226:23
8:30
+0:19
Half
13.11 mi12:43:021:49:478:225:53
8:37
+0:07
25K
15.53 mi13:04:252:11:108:2721:23
8:49
+0:12
30K
18.64 mi13:32:282:39:138:3228:03
9:02
+0:13
20M
20.00 mi13:45:032:51:488:3512:35
9:16
+0:14
21M
21.00 mi13:54:293:01:148:389:26
9:26
+0:10
35K
21.75 mi14:01:473:08:328:407:18
9:45
+0:19
23M
23.00 mi14:13:113:19:568:4211:24
9:06
-0:39
24M
24.00 mi14:22:263:29:118:439:15
9:15
+0:09
40K
24.85 mi14:29:573:36:428:437:31
8:47
-0:28
25.2M
25.20 mi14:32:523:39:378:432:55
8:27
-0:20
Finish
26.22 mi14:40:583:47:438:418:06
7:57
-0:30

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

7:57 /mi

Average Pace

8:41 /mi

Slowest Pace

9:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:28:19

39% of race

Time at Steady Pace

1:01:23

27% of race

Time at Slower Pace

1:18:01

34% of race

Average Pace: 8:41 /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 mi11:19:5126:368:3426:36
8:34
#17987
10K
6.21 mi11:45:2152:068:2325:30
8:12
#17111
15K
9.32 mi12:10:461:17:318:1925:25
8:11
#16636
20K
12.43 mi12:37:091:43:548:2226:23
8:30
#16710
Half
13.11 mi12:43:021:49:478:225:53
8:37
#16791
25K
15.53 mi13:04:252:11:108:2721:23
8:49
#17002
30K
18.64 mi13:32:282:39:138:3228:03
9:02
#17012
20M
20.00 mi13:45:032:51:488:3512:35
9:16
#17070
21M
21.00 mi13:54:293:01:148:389:26
9:26
#16973
35K
21.75 mi14:01:473:08:328:407:18
9:45
#17163
23M
23.00 mi14:13:113:19:568:4211:24
9:06
#17119
24M
24.00 mi14:22:263:29:118:439:15
9:15
#17191
40K
24.85 mi14:29:573:36:428:437:31
8:47
#17102
25.2M
25.20 mi14:32:523:39:378:432:55
8:27
#16985
Finish
26.22 mi14:40:583:47:438:418:06
7:57
#16795
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi179876548654815735(Top 59%)5134(Top 45%)5134(Top 283%)
10K6.21 mi3.10 mi17111+8765994+5545994+55416322(Top 61%)5468(Top 48%)5468(Top 301%)
15K9.32 mi3.11 mi16636+4755684+3105684+31015735(Top 59%)5134(Top 45%)5134(Top 283%)
20K12.43 mi3.11 mi16710-745743-595743-5916807(Top 63%)5825(Top 51%)5825(Top 321%)
Half13.11 mi0.68 mi16791-815793-505793-5018472(Top 69%)6749(Top 59%)6749(Top 371%)
25K15.53 mi2.42 mi17002-2115948-1555948-15518063(Top 68%)6584(Top 58%)6584(Top 362%)
30K18.64 mi3.11 mi17012-105969-215969-2117331(Top 65%)6261(Top 55%)6261(Top 345%)
20M20.00 mi1.36 mi17070-586012-436012-4317846(Top 67%)6657(Top 58%)6657(Top 366%)
21M21.00 mi1.00 mi16973+975975+375975+3715673(Top 59%)5444(Top 48%)5444(Top 300%)
35K21.75 mi0.75 mi17163-1906093-1186093-11820633(Top 78%)8285(Top 73%)8285(Top 456%)
23M23.00 mi1.25 mi17119+446087+66087+616578(Top 62%)6067(Top 53%)6067(Top 334%)
24M24.00 mi1.00 mi17191-726149-626149-6218270(Top 69%)7038(Top 62%)7038(Top 387%)
40K24.85 mi0.85 mi17102+896117+326117+3215079(Top 57%)5348(Top 47%)5348(Top 294%)
25.2M25.20 mi0.35 mi16985+1176062+556062+559399(Top 35%)2458(Top 22%)2458(Top 135%)
Finish26.22 mi1.02 mi16795+1905957+1055957+10511797(Top 44%)3617(Top 32%)3617(Top 199%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21story building
+97ft-345ft

Overall

15735

Females

5134

F45-49

5134

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

16322

Females

5468

F45-49

5468

10K→15K

6.2 - 9.3 mi

Top 59%
×3story building
+67ft-78ft

Overall

15735

Females

5134

F45-49

5134

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

16807

Females

5825

F45-49

5825

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

18472

Females

6749

F45-49

6749

Half→25K

13.1 - 15.5 mi

Top 68%
×4story building
+66ft-88ft

Overall

18063

Females

6584

F45-49

6584

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

17331

Females

6261

F45-49

6261

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

17846

Females

6657

F45-49

6657

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

15673

Females

5444

F45-49

5444

21M→35K

21.0 - 21.8 mi

Top 78%
×7story building
+17ft-86ft

Overall

20633

Females

8285

F45-49

8285

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

16578

Females

6067

F45-49

6067

23M→24M

23.0 - 24.0 mi

Top 69%
×6story building
+12ft-82ft

Overall

18270

Females

7038

F45-49

7038

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

15079

Females

5348

F45-49

5348

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

9399

Females

2458

F45-49

2458

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2story building
+22ft-21ft

Overall

11797

Females

3617

F45-49

3617

Passing Analysis

Category:
Athletes Passed
2641
Passed By
1449
Net Change
+1192
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17987
5K → 10K96185+876#17987#17111
10K → 15K52954+475#17111#16636
15K → 20K139213-74#16636#16710
20K → Half990-81#16710#16791
Half → 25K64275-211#16791#17002
25K → 30K173183-10#17002#17012
30K → 20M58116-58#17012#17070
20M → 21M13639+97#17070#16973
21M → 35K13203-190#16973#17163
35K → 23M10157+44#17163#17119
23M → 24M41113-72#17119#17191
24M → 40K10415+89#17191#17102
40K → 25.2M1170+117#17102#16985
25.2M → Finish1966+190#16985#16795
TOTALS26411449+1192
📊

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