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BOSTON MARATHON 2023

Suzanne Loftus

Bib: 19845•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 47%
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
8:48/mi
27:19
↑ 97↓ 3451.5%
10K· 6.21 mi
8:50/mi
54:45
↑ 79↓ 1380.4%
15K· 9.32 mi
8:41/mi
1:21:45
↑ 67↓ 78
20K· 12.43 mi
8:46/mi
1:48:58
↑ 106↓ 860.1%
Half· 13.11 mi
8:40/mi
1:54:53
↑ 19↓ 370.5%
25K· 15.53 mi
8:45/mi
2:16:06
↑ 66↓ 880.2%
30K· 18.64 mi
8:55/mi
2:43:48
↑ 181↓ 1480.2%
20M
8:49/mi
2:55:47
↑ 64↓ 500.2%
21M
9:16/mi
3:05:03
↑ 106↓ 241.6%
35K· 21.75 mi
8:40/mi
3:11:32
↑ 17↓ 861.7%
23M
8:43/mi
3:22:27
↑ 23↓ 630.6%
24M
8:32/mi
3:30:59
↓ 821.3%
40K· 24.85 mi
8:37/mi
3:38:21
↓ 200.3%
25.2M
9:05/mi
3:41:29
↑ 13↓ 160.2%
Finish· 26.22 mi
8:22/mi
3:50:01
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:54:53
Pace8:46 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:55:08
Pace8:47 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0227:198:4827:19
8:48
-
10K
6.21 mi11:46:2854:458:4927:26
8:50
+0:02
15K
9.32 mi12:13:281:21:458:4627:00
8:41
-0:09
20K
12.43 mi12:40:411:48:588:4627:13
8:46
+0:05
Half
13.11 mi12:46:361:54:538:465:55
8:40
-0:06
25K
15.53 mi13:07:492:16:068:4621:13
8:45
+0:05
30K
18.64 mi13:35:312:43:488:4727:42
8:55
+0:10
20M
20.00 mi13:47:302:55:478:4711:59
8:49
-0:06
21M
21.00 mi13:56:463:05:038:499:16
9:16
+0:27
35K
21.75 mi14:03:153:11:328:486:29
8:40
-0:36
23M
23.00 mi14:14:103:22:278:4810:55
8:43
+0:03
24M
24.00 mi14:22:423:30:598:478:32
8:32
-0:11
40K
24.85 mi14:30:043:38:218:477:22
8:37
+0:05
25.2M
25.20 mi14:33:123:41:298:473:08
9:05
+0:28
Finish
26.22 mi14:41:443:50:018:478:32
8:22
-0:43

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

8:22 /mi

Average Pace

8:47 /mi

Slowest Pace

9:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:40:45

96% of race

Time at Steady Pace

9:16

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:46 /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 mi11:19:0227:198:4827:19
8:48
#19421
10K
6.21 mi11:46:2854:458:4927:26
8:50
#19742
15K
9.32 mi12:13:281:21:458:4627:00
8:41
#19446
20K
12.43 mi12:40:411:48:588:4627:13
8:46
#19164
Half
13.11 mi12:46:361:54:538:465:55
8:40
#19137
25K
15.53 mi13:07:492:16:068:4621:13
8:45
#18899
30K
18.64 mi13:35:312:43:488:4727:42
8:55
#18499
20M
20.00 mi13:47:302:55:478:4711:59
8:49
#18273
21M
21.00 mi13:56:463:05:038:499:16
9:16
#18036
35K
21.75 mi14:03:153:11:328:486:29
8:40
#17988
23M
23.00 mi14:14:103:22:278:4810:55
8:43
#17785
24M
24.00 mi14:22:423:30:598:478:32
8:32
#17656
40K
24.85 mi14:30:043:38:218:477:22
8:37
#17524
25.2M
25.20 mi14:33:123:41:298:473:08
9:05
#17444
Finish
26.22 mi14:41:443:50:018:478:32
8:22
#17345
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi194217455745518927(Top 71%)7057(Top 62%)7057(Top 376%)
10K6.21 mi3.10 mi19742-3217621-1667621-16620085(Top 75%)7742(Top 68%)7742(Top 412%)
15K9.32 mi3.11 mi19446+2967421+2007421+20018927(Top 71%)7057(Top 62%)7057(Top 376%)
20K12.43 mi3.11 mi19164+2827212+2097212+20918467(Top 69%)6776(Top 59%)6776(Top 361%)
Half13.11 mi0.68 mi19137+277199+137199+1318791(Top 71%)6948(Top 61%)6948(Top 370%)
25K15.53 mi2.42 mi18899+2387060+1397060+13917677(Top 66%)6385(Top 56%)6385(Top 340%)
30K18.64 mi3.11 mi18499+4006863+1976863+19716748(Top 63%)5922(Top 52%)5922(Top 315%)
20M20.00 mi1.36 mi18273+2266745+1186745+11815567(Top 58%)5324(Top 47%)5324(Top 283%)
21M21.00 mi1.00 mi18036+2376611+1346611+13414856(Top 56%)4975(Top 44%)4975(Top 265%)
35K21.75 mi0.75 mi17988+486588+236588+2316278(Top 61%)5863(Top 51%)5863(Top 312%)
23M23.00 mi1.25 mi17785+2036492+966492+9614535(Top 55%)4929(Top 43%)4929(Top 262%)
24M24.00 mi1.00 mi17656+1296427+656427+6514718(Top 55%)5086(Top 45%)5086(Top 271%)
40K24.85 mi0.85 mi17524+1326356+716356+7114102(Top 53%)4813(Top 42%)4813(Top 256%)
25.2M25.20 mi0.35 mi17444+806317+396317+3913123(Top 49%)4321(Top 38%)4321(Top 230%)
Finish26.22 mi1.02 mi17345+996271+466271+4614604(Top 55%)5055(Top 44%)5055(Top 269%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

18927

Females

7057

F40-44

7057

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

20085

Females

7742

F40-44

7742

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

18927

Females

7057

F40-44

7057

15K→20K

9.3 - 12.4 mi

Top 69%
×5story building
+106ft-86ft

Overall

18467

Females

6776

F40-44

6776

20K→Half

12.4 - 13.1 mi

Top 71%
×2story building
+19ft-37ft

Overall

18791

Females

6948

F40-44

6948

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

17677

Females

6385

F40-44

6385

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

16748

Females

5922

F40-44

5922

30K→20M

18.6 - 20.0 mi

Top 58%
×5story building
+64ft-50ft

Overall

15567

Females

5324

F40-44

5324

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

14856

Females

4975

F40-44

4975

21M→35K

21.0 - 21.8 mi

Top 61%
×7story building
+17ft-86ft

Overall

16278

Females

5863

F40-44

5863

35K→23M

21.8 - 23.0 mi

Top 55%
×5story building
+23ft-63ft

Overall

14535

Females

4929

F40-44

4929

23M→24M

23.0 - 24.0 mi

Top 55%
×6story building
+12ft-82ft

Overall

14718

Females

5086

F40-44

5086

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14102

Females

4813

F40-44

4813

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13123

Females

4321

F40-44

4321

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2story building
+22ft-21ft

Overall

14604

Females

5055

F40-44

5055

Passing Analysis

Category:
Athletes Passed
2833
Passed By
757
Net Change
+2076
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19421
5K → 10K180501-321#19421#19742
10K → 15K37175+296#19742#19446
15K → 20K33048+282#19446#19164
20K → Half4013+27#19164#19137
Half → 25K25416+238#19137#18899
25K → 30K42020+400#18899#18499
30K → 20M2359+226#18499#18273
20M → 21M2425+237#18273#18036
21M → 35K6719+48#18036#17988
35K → 23M21411+203#17988#17785
23M → 24M1389+129#17785#17656
24M → 40K14210+132#17656#17524
40K → 25.2M855+80#17524#17444
25.2M → Finish11516+99#17444#17345
TOTALS2833757+2076
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing