Boston Marathon logo
BOSTON MARATHON 2023

Natasha Gunaratne

Bib: 13905•F

CA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 37%
Gender (Female)
#0 / 11423
Top 18%
Division (F18-39)
#0 / 4884
Top 32%
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
8:07/mi
25:14
↑ 97↓ 3451.5%
10K· 6.21 mi
8:08/mi
50:29
↑ 79↓ 1380.4%
15K· 9.32 mi
7:54/mi
1:15:02
↑ 67↓ 78
20K· 12.43 mi
7:51/mi
1:39:24
↑ 106↓ 860.1%
Half· 13.11 mi
7:46/mi
1:44:42
↑ 19↓ 370.5%
25K· 15.53 mi
7:49/mi
2:03:39
↑ 66↓ 880.2%
30K· 18.64 mi
7:52/mi
2:28:05
↑ 181↓ 1480.2%
20M
7:40/mi
2:38:30
↑ 64↓ 500.2%
21M
7:45/mi
2:46:15
↑ 106↓ 241.6%
35K· 21.75 mi
6:52/mi
2:51:23
↑ 17↓ 861.7%
23M
6:52/mi
2:59:59
↑ 23↓ 630.6%
24M
6:43/mi
3:06:42
↓ 821.3%
40K· 24.85 mi
7:01/mi
3:12:42
↓ 200.3%
25.2M
7:44/mi
3:15:22
↑ 13↓ 160.2%
Finish· 26.22 mi
7:05/mi
3:22:35
↑ 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 Half
Distance13.11 mi
Time1:44:42
Pace7:59 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:37:53
Pace7:28 /mi
📊Negative Split: 6.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:4125:148:0725:14
8:07
-
10K
6.21 mi11:18:5650:298:0725:15
8:08
+0:01
15K
9.32 mi11:43:291:15:028:0324:33
7:54
-0:14
20K
12.43 mi12:07:511:39:248:0024:22
7:51
-0:03
Half
13.11 mi12:13:091:44:427:595:18
7:46
-0:05
25K
15.53 mi12:32:062:03:397:5818:57
7:49
+0:03
30K
18.64 mi12:56:322:28:057:5724:26
7:52
+0:03
20M
20.00 mi13:06:572:38:307:5510:25
7:40
-0:12
21M
21.00 mi13:14:422:46:157:557:45
7:45
+0:05
35K
21.75 mi13:19:502:51:237:535:08
6:52
-0:53
23M
23.00 mi13:28:262:59:597:508:36
6:52
0:00
24M
24.00 mi13:35:093:06:427:476:43
6:43
-0:09
40K
24.85 mi13:41:093:12:427:456:00
7:01
+0:18
25.2M
25.20 mi13:43:493:15:227:452:40
7:44
+0:43
Finish
26.22 mi13:51:023:22:357:447:13
7:05
-0:39

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

6:43 /mi

Average Pace

7:44 /mi

Slowest Pace

8:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

33:40

17% of race

Time at Steady Pace

1:58:26

58% of race

Time at Slower Pace

50:29

25% of race

Average Pace: 7:44 /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 mi10:53:4125:148:0725:14
8:07
#14871
10K
6.21 mi11:18:5650:298:0725:15
8:08
#15278
15K
9.32 mi11:43:291:15:028:0324:33
7:54
#14751
20K
12.43 mi12:07:511:39:248:0024:22
7:51
#14093
Half
13.11 mi12:13:091:44:427:595:18
7:46
#14000
25K
15.53 mi12:32:062:03:397:5818:57
7:49
#13547
30K
18.64 mi12:56:322:28:057:5724:26
7:52
#12849
20M
20.00 mi13:06:572:38:307:5510:25
7:40
#12420
21M
21.00 mi13:14:422:46:157:557:45
7:45
#12004
35K
21.75 mi13:19:502:51:237:535:08
6:52
#11676
23M
23.00 mi13:28:262:59:597:508:36
6:52
#10990
24M
24.00 mi13:35:093:06:427:476:43
6:43
#10580
40K
24.85 mi13:41:093:12:427:456:00
7:01
#10254
25.2M
25.20 mi13:43:493:15:227:452:40
7:44
#10148
Finish
26.22 mi13:51:023:22:357:447:13
7:05
#9914
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi148714557455713553(Top 51%)3800(Top 33%)3800(Top 78%)
10K6.21 mi3.10 mi15278-4074819-2624819-26215718(Top 59%)5085(Top 45%)5085(Top 104%)
15K9.32 mi3.11 mi14751+5274505+3144505+31413553(Top 51%)3800(Top 33%)3800(Top 78%)
20K12.43 mi3.11 mi14093+6584140+3654140+36512098(Top 45%)3021(Top 26%)3021(Top 62%)
Half13.11 mi0.68 mi14000+934084+564084+5612448(Top 47%)3151(Top 28%)3151(Top 65%)
25K15.53 mi2.42 mi13547+4533831+2533831+25311224(Top 42%)2600(Top 23%)2600(Top 53%)
30K18.64 mi3.11 mi12849+6983462+3693462+3699865(Top 37%)2098(Top 18%)2098(Top 43%)
20M20.00 mi1.36 mi12420+4293223+2393223+2397974(Top 30%)1397(Top 12%)1397(Top 29%)
21M21.00 mi1.00 mi12004+4163012+2113012+2115947(Top 22%)796(Top 7%)796(Top 16%)
35K21.75 mi0.75 mi11676+3282839+1732839+1734623(Top 17%)430(Top 4%)430(Top 9%)
23M23.00 mi1.25 mi10990+6862491+3482491+3483085(Top 12%)212(Top 2%)212(Top 4%)
24M24.00 mi1.00 mi10580+4102319+1722319+1723242(Top 12%)243(Top 2%)243(Top 5%)
40K24.85 mi0.85 mi10254+3262175+1442175+1443978(Top 15%)416(Top 4%)416(Top 9%)
25.2M25.20 mi0.35 mi10148+1062135+402135+405163(Top 19%)808(Top 7%)808(Top 17%)
Finish26.22 mi1.02 mi9914+2342055+802055+805758(Top 22%)994(Top 9%)994(Top 20%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

13553

Females

3800

F18-39

3800

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

15718

Females

5085

F18-39

5085

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

13553

Females

3800

F18-39

3800

15K→20K

9.3 - 12.4 mi

Top 45%
×5story building
+106ft-86ft

Overall

12098

Females

3021

F18-39

3021

20K→Half

12.4 - 13.1 mi

Top 47%
×2story building
+19ft-37ft

Overall

12448

Females

3151

F18-39

3151

Half→25K

13.1 - 15.5 mi

Top 42%
×4story building
+66ft-88ft

Overall

11224

Females

2600

F18-39

2600

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

9865

Females

2098

F18-39

2098

30K→20M

18.6 - 20.0 mi

Top 30%
×5story building
+64ft-50ft

Overall

7974

Females

1397

F18-39

1397

20M→21M

20.0 - 21.0 mi

Top 22%
×8story building
+106ft-24ft

Overall

5947

Females

796

F18-39

796

21M→35K

21.0 - 21.8 mi

Top 17%
×7story building
+17ft-86ft

Overall

4623

Females

430

F18-39

430

35K→23M

21.8 - 23.0 mi

Top 12%
×5story building
+23ft-63ft

Overall

3085

Females

212

F18-39

212

23M→24M

23.0 - 24.0 mi

Top 12%
×6story building
+12ft-82ft

Overall

3242

Females

243

F18-39

243

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

3978

Females

416

F18-39

416

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5163

Females

808

F18-39

808

25.2M→Finish

25.2 - 26.2 mi

Top 22%
×2story building
+22ft-21ft

Overall

5758

Females

994

F18-39

994

Passing Analysis

Category:
Athletes Passed
5582*
Passed By
625
Net Change
+4957
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14871
5K → 10K148555-407#14871#15278
10K → 15K55528+527#15278#14751
15K → 20K66911+658#14751#14093
20K → Half1007+93#14093#14000
Half → 25K4574+453#14000#13547
25K → 30K7068+698#13547#12849
30K → 20M4301+429#12849#12420
20M → 21M4171+416#12420#12004
21M → 35K3280+328#12004#11676
35K → 23M6860+686#11676#10990
23M → 24M4111+410#10990#10580
24M → 40K3271+326#10580#10254
40K → 25.2M108*2+106#10254#10148
25.2M → Finish240*6+234#10148#9914
TOTALS5582*625+4957

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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