Boston Marathon logo
BOSTON MARATHON 2023

Nga (cindy) Phan

Bib: 19241•F

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 41%
Masters (Masters Women)
#0 / 6539
Top 29%
Division (F40-44)
#0 / 1878
Top 50%
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
8:03/mi
25:02
↑ 97↓ 3451.5%
10K· 6.21 mi
8:04/mi
50:07
↑ 79↓ 1380.4%
15K· 9.32 mi
8:05/mi
1:15:13
↑ 67↓ 78
20K· 12.43 mi
8:22/mi
1:41:13
↑ 106↓ 860.1%
Half· 13.11 mi
7:53/mi
1:46:36
↑ 19↓ 370.5%
25K· 15.53 mi
8:02/mi
2:06:05
↑ 66↓ 880.2%
30K· 18.64 mi
8:23/mi
2:32:07
↑ 181↓ 1480.2%
20M
8:32/mi
2:43:43
↑ 64↓ 500.2%
21M
9:09/mi
2:52:52
↑ 106↓ 241.6%
35K· 21.75 mi
8:00/mi
2:58:51
↑ 17↓ 861.7%
23M
8:28/mi
3:09:27
↑ 23↓ 630.6%
24M
8:33/mi
3:18:00
↓ 821.3%
40K· 24.85 mi
9:39/mi
3:26:15
↓ 200.3%
25.2M
11:13/mi
3:30:07
↑ 13↓ 160.2%
Finish· 26.22 mi
8:55/mi
3:39:12
↑ 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
Time1:46:36
Pace8:08 /mi
2nd Half
Distance13.11 mi
Time1:52:36
Pace8:35 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:1225:028:0325:02
8:03
-
10K
6.21 mi11:47:1750:078:0425:05
8:04
+0:01
15K
9.32 mi12:12:231:15:138:0425:06
8:05
+0:01
20K
12.43 mi12:38:231:41:138:0926:00
8:22
+0:17
Half
13.11 mi12:43:461:46:368:085:23
7:53
-0:29
25K
15.53 mi13:03:152:06:058:0719:29
8:02
+0:09
30K
18.64 mi13:29:172:32:078:1026:02
8:23
+0:21
20M
20.00 mi13:40:532:43:438:1111:36
8:32
+0:09
21M
21.00 mi13:50:022:52:528:149:09
9:09
+0:37
35K
21.75 mi13:56:012:58:518:135:59
8:00
-1:09
23M
23.00 mi14:06:373:09:278:1410:36
8:28
+0:28
24M
24.00 mi14:15:103:18:008:158:33
8:33
+0:05
40K
24.85 mi14:23:253:26:158:188:15
9:39
+1:06
25.2M
25.20 mi14:27:173:30:078:203:52
11:13
+1:34
Finish
26.22 mi14:36:223:39:128:229:05
8:55
-2:18

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

7:53 /mi

Average Pace

8:22 /mi

Slowest Pace

11:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

5:23

2% of race

Time at Steady Pace

3:03:28

84% of race

Time at Slower Pace

30:21

14% of race

Average Pace: 8:22 /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 mi11:22:1225:028:0325:02
8:03
#14420
10K
6.21 mi11:47:1750:078:0425:05
8:04
#14876
15K
9.32 mi12:12:231:15:138:0425:06
8:05
#14910
20K
12.43 mi12:38:231:41:138:0926:00
8:22
#15213
Half
13.11 mi12:43:461:46:368:085:23
7:53
#15115
25K
15.53 mi13:03:152:06:058:0719:29
8:02
#14765
30K
18.64 mi13:29:172:32:078:1026:02
8:23
#14527
20M
20.00 mi13:40:532:43:438:1111:36
8:32
#14451
21M
21.00 mi13:50:022:52:528:149:09
9:09
#14428
35K
21.75 mi13:56:012:58:518:135:59
8:00
#14338
23M
23.00 mi14:06:373:09:278:1410:36
8:28
#14230
24M
24.00 mi14:15:103:18:008:158:33
8:33
#14252
40K
24.85 mi14:23:253:26:158:188:15
9:39
#14468
25.2M
25.20 mi14:27:173:30:078:203:52
11:13
#14618
Finish
26.22 mi14:36:223:39:128:229:05
8:55
#14721
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi144204284428415030(Top 56%)4696(Top 41%)4696(Top 250%)
10K6.21 mi3.10 mi14876-4564576-2924576-29215336(Top 58%)4874(Top 43%)4874(Top 260%)
15K9.32 mi3.11 mi14910-344604-284604-2815030(Top 56%)4696(Top 41%)4696(Top 250%)
20K12.43 mi3.11 mi15213-3034817-2134817-21316050(Top 60%)5378(Top 47%)5378(Top 286%)
Half13.11 mi0.68 mi15115+984755+624755+6213588(Top 51%)3864(Top 34%)3864(Top 206%)
25K15.53 mi2.42 mi14765+3504565+1904565+19013060(Top 49%)3667(Top 32%)3667(Top 195%)
30K18.64 mi3.11 mi14527+2384465+1004465+10013572(Top 51%)4075(Top 36%)4075(Top 217%)
20M20.00 mi1.36 mi14451+764447+184447+1813874(Top 52%)4343(Top 38%)4343(Top 231%)
21M21.00 mi1.00 mi14428+234454-74454-714236(Top 53%)4613(Top 40%)4613(Top 246%)
35K21.75 mi0.75 mi14338+904411+434411+4312191(Top 46%)3554(Top 31%)3554(Top 189%)
23M23.00 mi1.25 mi14230+1084367+444367+4413030(Top 49%)4093(Top 36%)4093(Top 218%)
24M24.00 mi1.00 mi14252-224401-344401-3414789(Top 56%)5108(Top 45%)5108(Top 272%)
40K24.85 mi0.85 mi14468-2164558-1574558-15718859(Top 71%)7409(Top 65%)7409(Top 395%)
25.2M25.20 mi0.35 mi14618-1504663-1054663-10520942(Top 79%)8548(Top 75%)8548(Top 455%)
Finish26.22 mi1.02 mi14721-1034740-774740-7717553(Top 66%)6683(Top 59%)6683(Top 356%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

15030

Females

4696

F40-44

4696

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

15336

Females

4874

F40-44

4874

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

15030

Females

4696

F40-44

4696

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

16050

Females

5378

F40-44

5378

20K→Half

12.4 - 13.1 mi

Top 51%
×2story building
+19ft-37ft

Overall

13588

Females

3864

F40-44

3864

Half→25K

13.1 - 15.5 mi

Top 49%
×4story building
+66ft-88ft

Overall

13060

Females

3667

F40-44

3667

25K→30K

15.5 - 18.6 mi

Top 51%
×9story building
+181ft-148ft

Overall

13572

Females

4075

F40-44

4075

30K→20M

18.6 - 20.0 mi

Top 52%
×5story building
+64ft-50ft

Overall

13874

Females

4343

F40-44

4343

20M→21M

20.0 - 21.0 mi

Top 53%
×8story building
+106ft-24ft

Overall

14236

Females

4613

F40-44

4613

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

12191

Females

3554

F40-44

3554

35K→23M

21.8 - 23.0 mi

Top 49%
×5story building
+23ft-63ft

Overall

13030

Females

4093

F40-44

4093

23M→24M

23.0 - 24.0 mi

Top 56%
×6story building
+12ft-82ft

Overall

14789

Females

5108

F40-44

5108

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

18859

Females

7409

F40-44

7409

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

20942

Females

8548

F40-44

8548

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

17553

Females

6683

F40-44

6683

Passing Analysis

Category:
Athletes Passed
1722
Passed By
2023
Net Change
-301
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14420
5K → 10K132588-456#14420#14876
10K → 15K175209-34#14876#14910
15K → 20K101404-303#14910#15213
20K → Half1068+98#15213#15115
Half → 25K3577+350#15115#14765
25K → 30K29052+238#14765#14527
30K → 20M12650+76#14527#14451
20M → 21M9370+23#14451#14428
21M → 35K988+90#14428#14338
35K → 23M14335+108#14338#14230
23M → 24M5981-22#14230#14252
24M → 40K18234-216#14252#14468
40K → 25.2M4154-150#14468#14618
25.2M → Finish20123-103#14618#14721
TOTALS17222023-301
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing